He really wants to use the fewest amount of shims possible to give you the highest quality product. If you used a laser level his job would be easier. And you'd be happier living with the kitchen. You decide.

thanks, i guess what im trying to say is how much even-ness is acceptable? 10 ft level and you are off by 2-3 mm is that ok? there has to be some amount that is considered okay?

czarinalex, is it acceptable to shim the IKEA "Fixa". Ultimately, the countertop sits on metal FIXA.

Don't go crazy with cabinet leveling. Get it really close. You'd be surprised at the differences in thicknesses of countertops. Even dead perfect level cabinets often need small shims for tops.

thanks everyone