My wife and I have 3- .22 conversions between us and I think they help a lot. For drawing and getting a sight picture, transitions, movement, etc. I don't like dry fireing but I do like going to the range and running 200-300 rounds of .22 rimfire through. Some of the conversions are a little ammo sensitive, but that is not a big deal as they all run with the economy packs from Wally.
At the end of the practice session I do put the regular slide back on and run a few full power rounds downrange to remember what the recoil is.
Thanks,
George