Well, as I mentioned here, I just got a 200L AA on Monday. I finally got to take it out on one of my usual county road rides that I do. So what do I think? In a word, WOW!
As I noted in the other thread, I cannot believe how little this light weighs! All of the other reviews here have been spot-on. This is one well-designed and manufactured product.
Mounting the light was easy with the provided o-ring and it holds in place very nicely.
Performance: I started the ride on low and then part-way through the ride I kicked it up to high -- my riding partners didn't know what hit 'em! This little light is BRIGHT! I was able to see much better than with any of my old lights and, perhaps more importantly, I felt that on-coming traffic could see me. EVERY car that came towards us dimmed their high-beams as they approached -- something that never happens!!
I think I'm in love!