Product review (5 stars): A New World
This cook top is every thing I had hoped it would be. I was replacing another 30" cook top, so all I did was open the breaker, check to see if the circuit was dead, broke the old connection, popped-out the old cook top, dropped-in the GE, reconnected the wiring, closed the breaker, and that was it.  One note, if you downloaded the instructions beforehand: a couple of times the instructions make bold note that if you have aluminum wiring, then you need Al to Cu connectors.  Yep, but the COOK TOP has Al wiring, so if you have Cu wiring you need special wire nuts.  A simple, online check with Lowes or Home Depot, or a call to a local appliance store, to check availability and get three wire nuts for an Al to Cu connection.  For those with a science acumen, it's the galvanic action between the two, dissimilar metals that will cause corrosion--some will, incorrectly, say it's electrolysis, but that requires an electrolytic solution.
A few reviews as to cookware seem moot.  If one doesn't know what magnetic induction is, perhaps one should read-up on it before considering this item.  I recently changed cookware to Le Creuset Tri-Ply because I needed new cookware and had induction cooking in mind, also.  This is excellent cookware.  Lesser cookware will work on this cook top as long as it's of a ferrous material--stainless steel or cast iron.  However, the performance of this cook top using this cookware is outstanding--much better than my ancient experience with gas.  Amazing!
As for the 40 amp power requirement, when I popped the old cook top out, I noticed that the power rating was virtually the same as the GE one.  This cook top ran for years on a 30 amp circuit.  It should have been a 40 amp circuit, but the good ole boy electricians--I'm being generous--in rural East Texas used a 30 amp circuit and the old cook top never tripped the breaker.  Induction cooking has to use less power than an electrical resistance cook top.  Yes, induction and resistance are related, but using electrical resistance to heat has to be right up there with a wood-burning stove as to inefficiency.
Short version.  Get this cook top and some Al to Cu wire nuts.  You'll have no buyer's remorse.
BTW, instead of paying out the nose for an induction plate (hob) for use with your non-ferrous cookware, just get a cast iron griddle--preferably one without the built-up ring on the bottom. You're have to deal with the high specific heat, and resulting "thermal battery" of cast iron, but you won't need to use it that much. It's something that you'll probably want to have, anyway.

One year later: Outstanding!