Powercaster/Powermover etc.

Hello,
I've been seriously considering purchasing a powered dolly such as Powercaster/Powermover to quickly and precisely park my TM in the garage. I believe that RockyMtnRay has the Powermover and was wondering if anyone else has used either product or can suggest another powered alternative. I am required to keep it in the garage due to regulations, and moving it by hand is out of the question due to the driveway incline. I also believe that if I purchase one and it works as expected I would tend to pull the TM out to work on it much more often than I do now, and it would be handy to be able to load up the TM with clothes, food, etc. in advance of a trip.
It's a real chore to mount the hitch on the TV, line it up and hook it up, pull the TM out carefully and position it back in the garage with little room to spare. As an aside, I can tell you from practical experience that a new rear bumper cover is about $80 bucks and is easily installed!
Thanks and Happy New Year!
Dano