Product review (4 stars): Looks nice, cooks well, overall pleased!
This is a nice cooktop.  It can be fairly easy to install depending on your situation.  We went from a electric cooktop to gas, so we had to run a gas line which wasn't terribly easy for us.  Also the downdraft connection is rectangle versus round - I think others have mentioned this and yes, it's a pain.  You definitely have to be ok with a hack job, but if you've done much installation yourself you know that very little is actually "standard" and life is full of hacks.  We bought the model with the chrome edge and I am glad that we did.  The hole in our island was just a teeny bit too large and the edging helped mask that.  The electrical plug for the ignitor and downdraft is also oddly shaped so we had to do another hack job to get it to fit into the outlet, but we managed.

Once installed and lit, it works well.  The downdraft fan cover isn't as tight of a fit as I would like, but I'm ok with it.  The whole unit tends to get very hot, so be careful of that.  The flame is affected when the downdraft fan is on, but so far, I haven't seen it affect my ability to control the heat or the flame for cooking.  It is NOT easy to clean - but I've had glass top cook tops in the past and I know that none of them are very easy to keep clean. For normal messes I just wait for the unit to cool, remove the grates, clean with water and soap and then wipe down with some glass cleaner.  You can soak the grates if they get messy.  Yes I do find myself taking the whole thing apart after every time I cook something, because I am a very clean person... but in all honestly, the grates help hide a streak or two or a little bit of dust.

Overall I am pleased with the purchase.  It looks fantastic on our island and turned my kitchen into a cook's kitchen.  It's a great price as well - this one is one of the most reasonable I have seen.  If we weren't moving in a few years I probably would have bought a higher end model but this is a great in between option for us.