I've got one of the Shooter Ridge clones of the Harris and a couple Harris bipods, the Shooter Ridge is identical for all practical intents and purposes, works just as good, cost a lot less. I also have a swivel Harris, if you're shooting on any surface other than perfectly level as on a bench, the swivel is the way to go unless you want to deal with cant which isn't fun trying to level the non-swivel bipods.
Tim