Product review (1 stars): Terrible!  I am very disappointed
We have had this unit (in stainless steel) for almost 6 years.  We spent alot of money, and purchased the grill, griddle and extra set of burners.  WHile the concept is good, the left side takes long to heat up when the fan is on.

Also the unit is terrible to clean.  With the black surface, the grease just won't come off after a while.  At only 6 years old, it looks terrible and we can no longer get it clean.

I was hoping that Jenn Air made replacement burners with stainless steel bottoms, but it seems then dont.

We are very limited as few companies make stainless downdraft  units in gas at 30".  So it looks like we are going with Jenn Air's newer non-modular version with a stainless steel shell.  Hope we have better luck this time.