Just picked up a Streamlight 4AA at Costco. I was really looking for the Dorcy Luxeon, but they don't carry it at this Costco.
My impressions of the Streamlight 4AA:
Construction: very good. Feels like a well made light. I'm not a fan of plastic flashlights, but this one actually feels solid. I really like the texture on the plastic, and the rubber on the muzzle. The switch works well and is easy to use.
Disapointments:
Beam quality. After so many raved about how bright, white, good beam quality, and well flooded their beams were on the 4AA, I expected the same. Mine has blue tint, doesn't flood as much as I hoped, and has severe lines and artifacts in the outside of the beam (the area out of the hotspot). The little AA Dorcy I picked up at Target has better beam quality than my Streamlight. This being just one sample, maybe I got a lemon.
For $20, its a good deal, provided the LEDs don't blow (see below).
I'm tempted to buy another Streamlight 4AA over the weekend to see.
One question though: is the 4AA having problems blowing LED bulbs out? I recall that some people were having problems of the LEDs blowing due to being overdriven? Did Streamlight fix this?