Michael,
I have a Tailwheel Transporter. I dislike it because it's large, heavy, takes up a lot of hangar space, and is clumsy to use because it's a) large and heavy, and b) the handle is not centered on the tailwheel axis, so applying direct force causes the airplane to turn slightly sideways. In order to go straight, you need to operate the device like an IKEA shopping cart. These are just my opinions, so take it as one man's honest review. But I really feel like it's an over-engineered solution in search of a problem.
I now use a
Bogert Aviation towbar that's custom made to fit the RV. It's light, cheap, easier and faster to use, and takes up zero hangar floor space (just hang it on the wall). They have a demo video on the website. I highly recommend their product.