I've used these before my pitbulls. These things suck, they are not as solid or as easy to use as the pitbull restraints. The pitbull product is truely a low effort, one person operation. The STS stands still kind of need two people sometimes, they can be damaged if not lined up properly, and are not quite as stable since they still raise the back wheel, and you need a bit more space to use them since the bike has to roll past the stand and then back into it, where as with the pitbulls the bike just rolls forward into the stand and everything just clicks into place.