I used some of my Christmas money to buy a set of XS big-dots for my Glock 19.
These things ROCK!!!
I just got back from running 200 rounds through the thing (first time I've shot since I installed them) and was very impressed. My performance at 25 yards wasn't what I'm used to with the traditional post and notch sights but that'll just take some practice. However, at 5, 7, and 10 yards, I was very pleased with the speed with which I was able to acquire the target and re-acquire for follow-up shots. Mozambique drills are a breeze with these things.
here are a couple of 7-yard groups on the 3x5" cards I was using as targets (I had a "flyer" on the top card that just notched the edge of the card :redface: ):