Here's my only issue with the Sunway leveling base, and I'll admit I haven't used one. I have the RRS TA-U-LC on my Feisol and I can drop my rifle right into the clamp, which locks up tight. The RRS leveling base is basically one piece. The Sunway comes with what appears to be a 3/8" stud. If you want to use it for something like an MPA chassis that has the dovetail machined into the fore end, you have to attach a separate clamp. I'm not too keen on attachment points that are possible points of failure at the worst possible moments when I have a $3k+ rifle and optics combo sitting on top. Even if it doesn't fail, tightening the clamp to the stud means the clamp could come loose from the stud when I'm trying to pan with my rifle on top. Even if you use loctite, the rifle is basically acting like one big lever and you're applying significant amount of torque, depending on the tension of the leveling base. For glassing, I'd use it in a heartbeat. For rifle use, I'm not sure I'd trust it. Just something to consider.