I had a heck of a time finding much info before I put this together. So here is a thread for future folks.
So far I really enjoy shooting this. My dominant eye has an astigmatism and iron sights vary depending on the day how easy it is to focus.
Not to mention sight picture acquisition speed etc. Anyway, not going to spend a lot of time justifying the pros and cons. I like it. Isn't the first choice I'd make in the looks department but it is miles ahead of some alternatives.
One thing to mention. The RM46 mount meant for n-frames and x-frames is nice. But on mine it did require some file and stone work on the mount's recoil lug. It fits wonderfully snug but it appears they oversize the mount so a gunsmith or educated gun owner can make them fit exactly right. It's just aluminum so not too tough to work with. Be careful with those dremels!
Feel free to ask questions.