Product review (3 stars): works, but second duct could be longer
As the instructions lay out the installation, it isn't too bad - but the second portion of duct, then one that goes from the elbow to the side, is about 1-2 inches too short for my liking.  The original pieces that I removed (the back venting setup) had about 1-2 inches of duct protruding from the dryer that facilitated attaching the vent duct to it.  However, this kit results in the duct ending flush with the side panel of the dryer, making it difficult to attach the vent duct.  I was able to make do by swapping out a longer duct piece, however - and I'm now good to go.