I had Powertrax on my 84GN and liked it for the most part. I didn't like it at low speeds in a sharp turn...such as turning right after stopping for a STOP sign. It will spin the inside tire. I wanted something more streetable. Admittedly, I'm 63 years old so I'm not as flexible as I used to be.
I bought it because my car came with an open rearend and I could install the Powertrax without any special tools as the gears are not disturbed. One thing about Powertrax, both tires WILL turn at the same speed in a straight line!
Conrad