I love them, period. No regrets at all, and I'll probably add them to my Beretta eventually.
It took me a few days to get used to the new sight picture, at first I wanted to shoot a bit low. They haven't helped my accuracy much, but they have increased my speed.
I could tell a difference in speed during the last IDPA match I shot when there were moving targets. They had one of those star shaped spinning targets, where once you hit a steel plate it falls off, unbalancing the star and causing it to start spinning. I hit 5/5 and had an excellent time on that stage.
