I don't own one, but I am a fan of slider sights in general. I have a montana black gold ascent custom sight on my bow and love it. I went with 4 pins so I would be good to 50 without moving the site, which is inside most bow shots I'm willing to take. I do practice out to 100 with the sight, so it gives me a lot of confidence when shooting at the actual animals. As far as the react is concerned, I didn't look up how much it costs, but here are my thoughts.
It looks like a great idea, but sighting in this sight is pretty much the same as what I do for mine now. I haven't seen one in person, so I don't know how sturdy they are. I would be a bit apprehensive using the .019 pin diameter for longer shots as it will cover most of the animal... depending what you are shooting at. I use 0.10 diameter for my bottom two pins. Other than that it looks like a pretty solid sight overall.
