I have owned this cooktop since October, 2005. It is slightly different, as it has no lock, but everything else is the same. It looks brand new to this day, with no marks, scratches, nor discoloration of any kind. I took one star off the performance rating as the exhaust fan is not quite as good as the old drop in cartridge type smooth top that this unit replaced when we completely remodeled the kitchen. Because of this, I remove the exhaust cover to increase it's performance. For cleaning, I use the Weiman cleaning cream, spread all around with a Cerama Bryte Cleaning Pad, then buff off with a clean paper towel. If there is a stubborn dirt spot, I cover it with a wet dish cloth soaked in very hot water and leave it there for ten of fifteen minutes then proceed with the cleaning cream. Rinse the Cleaning Pad with clean water and it can be reused dozens of times, and they are available at the big box "home stores" for a very reasonable price. I am very pleased with this unit, and have no reservations about recommending it to potential buyers. Just know that you do have to spend five minutes or so cleaning it after use, but it is worth this very small effort.
- I recommend this product.