I got some of those a few months ago from Dlask. Medium height I believe. They do sit a bit higher, I guess because of the quick release mechanisim. I like them, and they do have a cool look. I did some brief testing as to if the hold a zero, and it seems to be alright. I guess I'll post a pic to show how they sit (and show off my new paint job)
It is nice to be able to remove the sight quickly as I still haven't decided if I prefer irons or a scope. So I usually shoot both when I'm at the range.