{ETA -- excuse the odd indented formatiing of this response. The site imposed this and doesn't allow for correction.]

1. Knobs -- still limited choices and most brands offer only 10 or so heat
   settings on the knob controlled models. LG has recently been offering one priced right at $3600, IIRC.
   Not seen any commentary on it, yet. Samsung has two slide-in models
   with minimal commentary here and some complaints abut warranty support
   elsewhere. There is the Miele, of course, which seems to have 12 burner
   heat settings. Dacor and Fisher & Paykel/Haier offer several models
   for about $5k (only 9 heat settings.) Viking has the ultra-high priced
   VGIS ranges which reputedly have near infinite burner heat settings but
   no digital read outs. Reviews on the Viking have been either very
   good (see Luv2Putt's "racing red induction" threads) or terrible (see
   the discussion in the Miele range thread by vickinbobyo). Frigidaire has
   the FGIS3065 which has 19 burner heat settings. At around
   $1500, the Frigidiare is far and away the value-priced leader. (The low price being a possible benefit to those who suspect the longevity of induction
   appliances -- really, any stove which relies on microprocessor driven
   electronic control systems). Few reviews here by owners of the Frigidaire, but a
   fair number of buyer comments on vendor sites. Mostly okay on
   performance with the chief gripes seeming to be a somewhat chintzy feel and having meltable plastic trim around the stove-top.
2. At this point, all the "bridges" on induction slide-ins are just a way of linking controls on two burners. Bosch is supposed to be getting ready to release a new model of induction stove which will have a bridged element consisting of an array of densely packed small elements as on the bridged element found on the current Bosch Benchmark cooktops. No details are available yet. A current thread here reports that the info is supposed to be released next April. Nobody else seems to be offering a slide-in with any additional heating elements between the burners (as you would find on bridged radiant electric stoves.) However, you could dispense with true bridging for a griddle by purchasing a Demeyere 21x 13 induction griddle. Pretty much seems to have solved the problem of evenly spreading heat all across the entire surface when straddling burners. Designed for induction, It is currently running about $119 in a clearance on the ZwillingUSA web site (Zwilling is the corporate parent; if you are not familiar with DeMeyere, it is regarded as rather high-end induction cookware.) The sale link is here. There have been postings about it here on the Gardenweb "Cookware" forum and a couple of long and very favorable threads on Chowhound. (That's where I found about it and why I now have one. So far, mine has worked as advertised and it is pretty close to non-stick even without coatings or seasoning.)
3. Flex/double oven: At present, there do not seem to be any double-oven slide-in induction ranges other than the Samsung "Chef Collection" slide in model with the divisible oven feature. Beyond that, AFAIK, only the touchpad controlled Electrolux slide-ins have a beefed up lower drawer that work as a "baking" drawer. Past reviewers have said it is workable for some baking but get call it a toaster oven with delusions of granduer because it runs on stepped down 120v power rather than the full 240v used in the main oven. You might be better off --- if you have countertop space --- to consider one of the more capable and well-reviewed countertop units such as the Breville "SmartOven" or the Cuisinart CSO300 combi-steam convection oven.
4. Convection convert: Pretty much everybody has this as an option on induction ranges. Either it is an option you turn on or it is an automatic feature that you have option to turn off. A word of caution -- there are a lot of potential variables affecting when turning down the oven heat by 25° works well and when it does not. With my kitchen at close to 6000 feet in elevation, I've never found it necessary to use the "turn-down" option. YMMV.
5. Programmable ovens. The Miele oven set-up is genuinely amazing, isn't it? I don't think anybody else even comes close to matching its capabilities. I kind of recall that the LG and Samsung ranges have some programming available but nothing like what you get from Miele. The GE slide-in is supposed to have some programming via smartphone/wi-fi aps, so you might look into that if you are considering a touchpad slide-in induction range. IIRC, Electrolux has a few choices like "perfect turkey" which utilize a wired temperature probe.
6. Depth dimensions with and without handle: some makers provide it, some do not. GE does. (Go to a vendor site like ajmadison, click on the specs tab.) I recall Miele giving you the depth to the front of the control panel but I think my Miele-interested friend had to call a store to get the handle dimension. Some brands may bury the info in their downloadable installation instructions. Some give you the information if you call or log on to customer support. Some leave you to go to a store and take your own measurements. Fortunately, for brands like Samsung, the dimensions will be the same as on their radiant electric models which are much easier to find in stores.

Wow great feedback. Thank you JWVideo. I already own the Breville counter oven and am thinking the Demeyere induction griddle may find 9ts way to my house before I decide on 'the range'. Thanks for the link. I wasn't sure how the bridge works and it's nice to know it's not an issue with this griddle.

Do you mind if I ask if you own an induction and if so, which one you decided to go with?

I'll need to look further into the depth issue I think it'll be ok but want to look into it for confirmation.

I've read so much on the forums and can't remember how the customer service is with Electrolux and Samsung? I was looking at Samsung's Chef Collection fridge and really like that as well.

On what I own: five years ago I wound up with a pro-style gas range and a commercial single burner induction cooktop on the side, so probably not helpful to your current choices. Back then, I kind of developed some expertise and have been helping friends shop for new stoves as a result. Recently helped a friend who was interested in the Miele induction range and wound up tempted enough to research it for myself. What deterred me from buying it was the combination of: (a) extraordinary price combined with lack of a ten year warranty; (b) only 12 burner heat settings (which might or might not be a concern for you); and (c) being hundreds of miles outside the range of the nearest Miele factory service.

On customer service and support questions about Samsung and Electrolux:

Samsung customer service has had its issues, mainly with responsiveness and parts availability according to posters here that I've read over the years. Several regular posters here work in appliance repair services and report that, in some areas of the country, parts availability for the fridges is much improved. Have not seen much written here specifically about the quality of Samsung slide-in induction ranges. I can recall only one posting --- somebody in the long thread on kitchenaid ranges (LeslieBaldwinTurner??) had gone through a spate of warranty problems with two successive Chef Collection induction ranges and wound up trading back to the dealer for the newly released KA slide-in model.

Electrolux (includes Frigidaire) seems to have a decent reputation for warranty service. The rap on the induction products seems to be the very high cost of replacement controller boards (a cost high enough to make it seem more economic to buy a replacement range or cooktop.)