Jimr,
I have this mounted on a Kimber Gold Match, and am going to mount it on my Premier II when I get it.
These work as advertised, at least for me. It is not a sight that you would want to use on your primary home defense weapon, as you must take the cover off in order to activate it. I shoot a lot at 50', and it is very accurate on bullseye style shooting.
I had a few problems in adjusting it initially, but once I had it zeroed in and had the screws locktited (is that a word??), it has held for the last 8-9 months. I shoot about 400-500 rounds a week, mainly through this pistol, and it has been rock solid.
No, I am not a sales person for Tasco. Also, I would like to report that of the many thousands of rounds through the Kimber, no problems except those that I created with my own handloads (for those doubters and naysayers).
Casey