I have a sirt and think it's a great training tool. Although there is no recoil it allows you to work on mechanics. Driving from one target to the next instead of just repeated shot on one adds an element of sight tracking. Not like w/ recoil but worthwhile. Unlike any other dry fire (at least w a glock) it permits double taps. Since many say a good/fast double tap has basically 1 sight picture learning to work the trigger rapidly is another benefit, and lets face it for some its safer to push the limits of speed without live ammo the first few times. I've seen a few wild (but thankfully down range) shots when people first start pushing speed.