I bought it for my CZ 75 SP-01. Yes it will be cheaper to buy a stand alone .22. break even point might be 2000 rounds??? Point is, I can practice with my 9 mm sights, grip etc, in other words, get a real good feel for the gun but I'm only spending penney's a session vs. quarters. Might not make fiscal sense for some but I'm glad I made the move. I already own a 22/45 ruger in .22. nice gun and I shoot it a lot but not same feel as my CZ 9mm.
Homegrown tomato's- all winter long without 'em is a culinary bummer!