After using the neighbors ProWalk horse walker for almost 4 years, I finally bought my own.  Installation was even easier than I expected.  After the pad was in, my wife and I assembled the entire unit in less than two hours. 

The hardest part is raising the arms up and into the holders. We discovered it was a lot easier to do it from the back of the pickup.

Attaching the steel support cables was easy on the first 2 or 3, then it got harder to get the ends over the bolts. I connected a nylon strap and come-along between the arms, and a couple of clicks later, the cable slipped right over the bolt.