Product review (4 stars): It Works
This Whirlpool Gas Dryer connector kit lives up to expectations.  The hose and fittings are of good quality, and I liked the tube of fluorescent leak test liquid better than using soapy water.  I found the tube of thread sealant was on the small side.  I recommend laying out a few dollars for a small jar of good quality plumbers dope.

I gave it only four stars because the kit included instructions for a dishwasher water line hook up instead of those pertinent to this product.  I've done this many times, but the lack of instructions was disconcerting.  This is a pretty big omission given the potential consequences of improperly hooking up a gas line.  Out of curiosity I checked to see if the actual instructions for this kit were available on line and they were not.  If you've never hooked up a gas dryer before, it's not difficult but you'll want to seek out a good instructional video.