Product review (1 stars): Avoid this dog
If I had it to do over again, I wouldn't get this cooktop. I'm a serious cook and there are major problems with this unit.

1. The racks are so high above the flame that it takes forever to heat anything.
2. Only the center large burner is large enough to heat quickly.
3. The other 4 burners are agonizingly slow to heat even small amounts of food.
4. The flame "hisses" when you turn it on high. Annoying. It's not silent the way it should be. The "hiss" only disappears when you turn it down to simmer.
5. When you use the center or rear burners, because the knobs are in front, you have to bend forward to stir and tend your pots and pans.
6. The knobs don't have a gentle "stop" area where you can feel when you have reached either the highest or lowest setting.

Please, if you cook often, this isn't your cooktop. The previous iteration of Thermador's gas cooktop, which was available in all black is no longer available, was FAR better, with better design. Whomever designed this model isn't a cook.

Sorry, Thermador, but you really blew the design on this model.