This induction cooktop has worked flawlessly and is very efficient.  First, tested all of our cookware to ensure it was induction compatible.  Had to purchase some additional cookware, making sure it was of good quality.  The unit is the best electric cooktop we have ever used.  The temperature is well controlled, from simmer to boiling water, and is very sensitive to adjustments.  I find it very similar to cooking with gas appliances.  Reading the instructions and using the 'Lock' feature allowed cleaning the cooktop without turning on any "burners" as was noted by other reviewers.  Also have not noticed much noise, just a quiet humming.  However, I am using quality cookware as recommended in the operating instructions.  Cleaning is a chore, but it is no different than other glass cooktops.  Reason I marked down quality is that the baffle holes did not line up requiring me to drill new holes.  Should have been caught by QA.  All in all, I am completely satisfied.