i had two, sold em both. they're cool and all, just not for me.
didn't care for the tailcap for two reasons. it adds too much length to the light, when you're used to an E2e in your pocket it shows. the switch takes too much twisting to put it through it's paces. i could smoke one waiting on the switch to bottom out! /ubbthreads/images/graemlins/grin.gif it almost exposes the oring when you lock it out. when you screw it all the way down, then back out it binds about midway, both lights did this.
even after folks here assured me the circuitry is durable, i still do not like the fact there is something else to fail in the light from moisture or shock and adding yet more length. i never really noticed a difference in my E2e yellowing or getting dimmer. i'm sure it does, but i guess i don't notice it. however, i use my lights and don't stare at them on the wall waiting for something to appear......elvis maybe? /ubbthreads/images/graemlins/wink.gif
ofcourse, the price. for one A2 i could get 2 E2e's or E2e + KL1 for less.