Greetings!
I don't currently own an A2 - but I did last year (Red LED version). I'm going to buy another one either today or Monday... probably a White LED version.
I absolutely LOVE the A2 - it's a fantastic and very under-rated light. It's exactly the right size for EDC and ergonomics, and the incandescent beam is nearly perfect for outdoor hiking and camping uses. The bulb is soft-start, I never burned one out on mine before I sold it... and it stays the same brightness throughout the life of the battery due to excellent regulation.
I currently own a Kroma, among my other Surefire lights... and I was hoping that it would replace the A2 I sold so I wouldn't need to buy another one. It hasn't - for two reasons. While I completely LOVE the features of the Kroma, it isn't quite as pocketable for EDC as the A2 was, and I really, REALLY miss the nice coloration of the incandescent beam. I have YET to find an LED light that matches the A2 for color preservation in the wilderness and depth-perception-retention (if that makes sense...) or the nice warm tone that the light gives to everything it shines on. It makes LED lights seem cold, harsh, and somewhat ghostly by comparison.
Best wishes,
Bawko