Two observations from my experience with my Lead Sled:
1 - Take a cushion to sit on. If the seats are the right height for the bench you are shooting from, you'll want to be a bit higher to comfortably get a good sight picture when using the lead sled. The cushion sure beats sitting with your leg folded up under your behind!
2 - Take a couple of boards with you of varying thicknesses to shim up the front of the rest. Even with the adjustable front rest at max height, I needed about 3/4" more height to get on target at my range's 100 yard targets. Seemed odd I had to do that, since the ground slopes away from the shooting position down to the target stands, but the target stands do put the targets at eye level, so...
Other than that, it seemed to work well for me and my .30-06. I used a single 25# bag of shot, and the recoil with factory 165gr loads was barely noticeable.
Just a Shooter