I installed one of these on my 2005 DR650. It did exactly what I wanted it to. I could get to the trailhead on 2 wheels, ride a loop, then hop back on the motorcycle for the ride home. Yes, putting the gear back on after a mtn bike ride was questionable, but not horrible.
The most frequent use of the system was actually as a tail rack, though. It made a great platform for strapping down duffel bags, tents, etc!
I ended up selling it with the DR650 when I decided to go for a V, and now I just use my car to get to the trail. I can recommend it for anyone that wants to load their bike up on their motorcycle. The caveat is that on a lightweight bike like the DR, it had a noticable effect on handling.
SW Motech Engine Gaurds, SW Motech Alu Rack, KTM handgaurds, Custom iPhone mount with Powerlet and heated grip switch