Product review (1 stars): Warning... I purchase the 30" model of ...
Warning ... I purchased the 30" model of this cooktop and within a year and half, a light under one of the knobs failed and the center burner stopped working... the authorized repair man we brought in informed us that Thermador uses an unusual combination of metals at the burners that cause the bolts under the burners to "freeze up" which makes them costly to repair (they need to be drilled out to open for repair).  Our estimate to repair was over $700.  Beware.