Product review (5 stars): 1.2 years old and definitely 5 stars.  'Love this high end range!
I bought our Jenn Air JDS9865 30" slide in gas down draft range over a year ago practically with a blind leap of faith due to the negative web reviews.  What a waste of my energy trying to think of reasons not to buy this exact range that would fit perfectly to replace our existing electric downdraft that was on its last leg.  This one's a winner, does exactly everything as designed very well.  And we have no complaints about it whatsoever.

Ended up selling that old Jenn Air electric range easily online, which more than paid for the gas line and 120v electric installation upgrade.  Tip:  Be sure to have your installer visit your existing kitchen so you'll have everything ready in advance for your install day with no delays or headaches.  It's very solid and quite heavy.  Everything appears very precise and well-made.  My wife and I both LOVE this range!  It's been perfectly reliable, great technology and mix of solid-feeling heavy metal controls.  The first thing we did was carefully explain to our housekeeper to NOT spray any cleaners directly on to the electronic keypad area, because I'm convinced that would certainly cause corrosion and eventual computer-ribbon failure, as is clearly warned in the manuals, which I'm positive those negative reviewers neglected to read, because they probably can't.  Buy this one with confidence.  Read and follow your Jenn Air rebate certificates (and why not the manual) carefully so you don't leave any money on the table.