That design was the old High Standard Duramatic; it has now gone through three companies (High Standard, Colt, and Beretta) and the first two had little success with it. When the guns work, they are OK, but the design with the recoil spring and firing pin spring requires some delicate balancing which always seems to go awry after the gun has been used a while.
When they get out of whack, as they always seem to do, they are a PITA to fix in spite of what seems like a clean and simple design.
Let's hope Beretta has better luck, but even if I needed a .22 pistol, I would wait and see how the NEOS works out.
Jim