I haven't used that one. But I've tried two others that were similar. Im not a fan of having my seat attached to the bench, unless it's a heavy bench. I don't like the idea of having my butt attached to my reticle. Any movement in your body results in a moving bench. I'd reccoment sitting in it at Cabela's if they have. Demo out. Maybe ask if you can use a scope and rest it on the bench. When looking through it move a little on the seat and see if it gets all wobbly on you. OR, if you want. I make benches and sell them. All proceeds to ducks unlimited.
Here's the link if your interested.
http://www.outdoorsmenforum.ca/showthread.php?t=317412