right now I'm very impressed with stock design. It incorporates several features off the shelf which for others must be added later.
length of pull- can be changed in seconds and comes with washers of different thickness to achieve desired length, the PITCH can be adjusted here as well
Pad position- Simply loosening one fixture the pad position can be changed from toe in to toe, pad height/up and down, as well as cast in/out
The only thing i'm not to crazy about is the beretta adj, comb hardware, although I never have liked it often opting for a graco replacement.