Have em on my Kimber, like he said, not too bright, not too dim, I like them.
Honeslty I don't know if I would have paid extra for them though, they came with the gun.
Just not sure (for me) they're worth the extra expense.
I know they are supposed to be very helpful in low light shooting situations, but in my mind if it's that dark that I'm going to need glowing sights to shoot effectively, it's probably too dark to see my target anyway.
Personally, I don't really like the 3 dot systems very much but they do have their uses. There are other (better, in my opinion) night sight systems like Heinie Straight-8 that are worth looking into as well.
And getting 3 dots of the same color can be an issue since it is possible to line up the wrong dots under pressure.
I have them on my s&w 5946, Dont really glow worth a hoot but they came on the gun. As per their use in a low light situation I would be more concerned with target identification."IN A FIGHT..FRONT SITE' Some things just pop back in your head ;D