That's the one I have and I really like it a lot. I picked it up used off of ebay. I plan on only using it for 3-D and target shooting for right now though. I've read about several people that do use them hunting, they just set them for about 30 yards and then know what their hold is for closer or farther. Myself, I'd much rather stay with a fixed pin for hunting just for the ease of adjusting to an animal that moves closer or farther and still being able to hold a pin where I want to hit, especially elk when calling them in.
The sight picture on a single pin is really nice though, and when target or 3-D shooting I really like that I can dial it in to the exact yardage.
It's really a matter of personal preference as far as hunting, so that part will be your choice. I don't think you'll be disappointed by an HHA, it is a quality sight. They seem to have good customer service too, my brother in law had his level fall off and get lost. He emailed them what had happened and they sent him a new one right away.