I did a lot of research before buying my lifts, and all the shops I talked to said Benwil and BendPak weren't the best choice for my application. Their major complaints weren't necessarily for overall quality but for customer service when something _did_ break. As a shop owner, it's important that my lifts are down for a minimal time. If it takes two weeks for the manufacturer to get me parts, that just won't do. That was the biggest complaint of the shop owners I talked to who had Benwil or BendPak lifts. We've only had one problem with one of our Rotary lifts, and it was fixed in two days. Great service, but then again, you pay more for it.
So, for someone looking for occasional usage, the Benwil or Bendpak lifts may be just fine. For a commercial application, I opted to spend a bit more for peace of mind and better reliability.