Things I liked:This is an excellent product! Absolutely bulletproof. I'm using this scope mount on a Gamo Bone Collector Bull Whisper. Scope - UTG 3-9x50mm with AO (SCP-U395AORGW). Everything fits perfectly and the objective sits about 3/16" above the barrel which is just about as close as I would want it. Tip: Be sure to use Scotch double sided tape between the rings and the scope if your gun is a springer. My scope moved in the rings without the tape. The Gamo has some SERIOUS recoil! Things I would have changed:Nothing.