Product review (4 stars): It does what you'd expect - moves the rear vent to the side (or bottom)
While not the easiest thing to install due to having to fit your hands into the dryer through the vent holes, it worked well and provided sufficient protruding duct (at least on DLE1101W) on the side to easily mate up to my home's exhaust line.  I'd rate it 5 stars if it weren't for the time and effort it takes to install (a removable panel across the lower back half of the dryer could have made this an easy install).