Product review (3 stars): Hidden Suprize
I bought this used.  It came out of apartment project in Florida.  After installing it I was beset with german cockroaches,  Now, I can't say for sure that they came with the stove top, but we'd never had them before and all of a sudden there were a bunch of them.  The device itself works fine, but it's kind of like buying a mattress fro a thrift store.  Now I know.