Expect large size!
Mine is limited by temps under zero F and more recently one of my three (I like this rose) got set back by the very late Easter Freeze (as did many, many other roses that couldn't take 18F for three nights when they were in full bud).
Mine grows well, but the surprise has been how early blooms start. Books from England don't call it a spring bloomer, but mine starts in May. For you, it will probably start earlier. And last later.
Growth on mine is predominantly upright and new basals make sprays of fifty to sixty blooms that come over a three week period. But, don't prune the spray off after blooming until you get a feel for where the new growth comes out. As I recall, new growth comes from within the stemlets that make the spray, similar to some polyanthas. After the new growth gets going a simple swipe of your hand will knock off the none productive growth...no rush, wait for it die.
Because this is a healthy rose with no botrytis, you can let it decide what to abandon and where to grow. It leads, you and I follow. Works up here in a much colder zone.

How tall and how wide is yours? Mine is grafted on fortuniana, so mine will ultimately get much larger.

Also, is it a bush that deserves to be a focal point, or more of a background rose to be enjoyed?

In regards to pruning to control the size (somewhat), how does it take to that? Does it get mad or does it take it in stride?

Sandy

Mine has been six feet tall and five to six feet wide. But I've seen the difference fortuniana can make. You need to contact Malcolm Manners or other folks at Central Florida Heritage Rose Society (they meet in Lakeland) to see sizes there.
Winter has done my pruning (not my choice of cut backs necessarily) and it keeps coming back. Mine makes woody canes with time, but I would expect yours to approach Crepe Myrtle in size.
I love the scent of mine, which argues for it being placed where where winds waft the scent to where you enjoy being.

Crepe Myrtle size?! Oh my goodness! I really don't want anything that big, as I'm running out of room. Crepe Myrtles grow like monsters down here! Malcolm did say that it would be somewhere around 6 to 8x8. He is actually who I got this rose from, and I'll e-mail him to see how he feels it takes to pruning. Now I'm assumuing that the 6-8x8 size is with pruning done to control it.

I am still very interested in hearing various experiences with this rose. I guess my big question is if anyone has pruned this rose to keep it in bounds (such as 8x8) and still gotten it to bloom well.

I'm also interesrted in hearing how well this rose is loved, (or not). This will have bearing on its placement.

It is so fragrant. Mine is a tiny baby, but the few blossoms it had smelled delicious. That is partly why I got it. I also like the fact that it is a very, very old rose.

Sandy

Ours have never been more than 6 feet wide by perhaps 4 feet tall, on 'Fortuniana'. We do prune heavily in the spring, (to perhaps 2x2 ft) so I don't know how big it would get if we just let it go. But with one annual pruning, I do not consider it a larger-than-average OGR.

Thanks Malcolm. I don't plan on just letting mine "go". She'll be kept pruned.

I noticed today that mine has a bud on it, something I didn't expect this late in the season!

"this late in the season" -- in our climate, it will bloom continuously until you prune it, then pick up again 8-10 weeks later. It is a bit slower to come back into bloom after pruning that most roses, but once it starts, it won't stop.

It starts around the usual rose season here, too, and doesn't stop until the bitter end. It did this even from a small plant from Vintage - either it's the southern heat or our low latitude, or there is something else going on. My mother planted a single-flowered R. moschata from Sequoia in the garden in Minnesota, and it spent the entire year growing without a single bloom (I'm assuming they sent the real deal, although I never asked for a picture to examine closely).