Yeah, they're a mite expensive, but go to any high-end electronics shop and that's all you'll see.
Stick your finger between the vise jaws.. You can tighten this baby in such fine increments, its rare to break a fragile part in it. You can get metal jaws as an option, but the plastic ones that come with the vise work better for just about all applications. In fact, tool geek that I am, I've never needed any of the optional bases or heads Panavise offers. So I 'saved' money right there.