I believe they are allen wrench and all micro adjust. At least the ones that I've seen.
I had one in my hands a while ago and didn't pull the trigger. I have a HHA adjustable similar to the one in my previous post. It's actually all that I need. IF I were looking for a fixed pin sight, a Hogg would be screwed to my bow. Also I've heard good things about the Hoggwrap fiber system.
The whole setup isn't cheap, neither is anything that's top notch. If I were making a trip out west for mule deer or elk, I could justify the need. But for WT hunting here in PA where 35-40 yard shots are about on the extreme end of the shots, one adjustable pin will work.