I have one and love it. It's a little squirly getting tuned at first, and there's no microadjustments, but that goes to weight savings actually. But once tuned it's rock solid and reliable.

The only thing I don't like about it is the slight noise it adds to the shot when the rest hits the shelf pad (it has it's own shelf rather than using the riser shelf to hold the prongs closed). Just a little tiny thump.