I can tell you that the Kimber .22 conversion that I bought, used, for a Colt Gold Cup shoots straighter than the road to hell, and has been entirely reliable with good ammunition (CCI's) and even works well with Federal bulk pack stuff for autos.
The package also shoots extraordinarily straight.
There is apparently some challenge in getting the slide stop to engage with magazine actuation, so it doesn't work that way on the Kimber. However, a 'dry snap' on an empty chamber is supposed to hurt nothing whatsoever.
If my experience is any guide, get the Kimber and have done with it.