have been tempted, but they are just not mini enough to suit me
a cheap alternative is a fiber optic front, if your front site is pinned
can be pretty stunning when shooting in direct sunlight
I do run a Millet 1" 3MOA red dot on a Ruger MKIII pistola though, and it is a good setup
just have to know your elevation to compensate for bore line vs sight line unless always shooting at one given distance, no different than any scoped gun
all red dots do suffer from "parallax" though, contrary to some claims... you need keep that dot well centered in the optic if really want best accuracy