I've tried big ball, which I didn't like with this gun, nor did I like all-starts. I can tell you there are deffintly a lot of good possitives. To start out with, Simplicity. 4 screws, and you have the valve, vertical asa, the velocity adjuster, mainspring, and all the other parts. Very fast fiering.
Spyder barrels are compatible.
Not everyone know about this gun. The velocity adustment. It comes off failry easily too. I've chopped a few balls with mine. If your considering a spyder, I'd seiously take a look at this gun.