I have only had this unit for a few days, so don't know how it will hold up over time, but it works like it's supposed to, and I'm very happy with it so far. I'm not thrilled, however, that the price has dropped by $20 in the few days since I bought mine! Like others have said for others of the induction cooktops, the heat is concentrated in the center 4" of the plate, but this is not a real problem for boiling water, etc. And, if using a pot/pan that spreads the heat well, such as iron or pots with a thick clad bottom, it seems to mostly work out ok for other things. I had a problem trying to make an omelet, but maybe if I heat the pan slower and then add the eggs, the heat might spread out to the edge of the pan better (scrambled omelet wasn't bad, however). It might not work well for everything, but for most everything I've tried so far, it worked fine, and doesn't heat the kitchen up a lot. My 3 different sized steel pots with steamer inserts worked fine - 2 are Tramontina (from Walmart I think) - as did my iron and iron-enamelled pans, so I probably won't need to buy any pans especially for this cooktop.
After 5 months my unit is still working fine, and I use it for most of my "stovetop" cooking. I wouldn't mind a finer control for very low temps, but the 10 settings provided work pretty well for most everything. For a few things I switch back and forth between setting 1 & 2 or 2 & 3 - mainly things like hot toasted sandwiches (which I cook in an iron fajita skillet, with a 2nd skillet on top to weigh it down). I found that a silicon potholder (got mine from Target) works great to put under the pots to protect the cooktop from scratches. I haven't noticed that it matters whether the pan is perfectly flat (maybe the potholder underneath helps this?). Also, the manual says not to use the cooktop on a metal surface because the magnetic heating may heat the metal surface underneath, but I put a large wooden cutting board (about 3/4" thick) over the 2 LEFT burners (oven heat exhausts through the RIGHT rear burner on my stove) and put the Burton cooktop on top of that to cook and have not had any problem with the stovetop underneath becoming warm. I don't do huge amounts of cooking, so with this one on the left, along with the small and large regular burners on the right, I have all my cooktop needs met. I use this, my microwave, outdoor grilling, and a toaster oven & crockpot which I use outside on the porch, to minimize kitchen/house heat from cooking during the summer, which of course is very helpful in Texas.
(Note that there are some very informative reviews for the Burton 6000 model which are relavent to induction cooktops in general.)
2nd update: This unit has performed flawlessly for over a year now. I use it frequently to boil water for when I wash dishes by hand - hot water heater is far from the kitchen and no matter how high I set it the hot water is just not hot enough. So, I lowered the thermostat to 120 deg and just heat a small pot of water to add to the dishwater. However, I do not use this burner for some things, such as deep frying, and it doesn't work with my old-school Corningware which I like to use for some things, like making jam, so I would not want a stove with only induction burners; a couple of each would suit my needs better.