I got mine in a retail shop in Boston. The guy even explicitly knew that the E1L, E2L, and L1 were new 'upgraded' versions, which impressed me. Since I got it pretty recently after it was released, I think it was one of the earlier ones but mine has no issues at all with flickering, and I even use RCR's with it for even more of an output boost! (Not recommended, heh)
I was also amazed at how well centered the LED is, and how well the light is output with the optic instead of a reflector. The tint is also very nice, the best and warmest out of all my LED lights. I picked up a new E1L with it as well, but the tint on that one was kind of green... that light has been since given away to my brother, and then to his gf. At least I know it's keeping someone I know out of the dark.
Here's some beamshots of a few of my LED lights with the L1 on RCR's (I couldn't find my P3D for some reason...)
https://www.candlepowerforums.com/threads/176090