Yes, I have the current (gen 6) 519a LED in cool white.
I quite like it
.
They claim 420 lumens but that must be on li-ion 3.7v. It looks more like 200-250 to me on 1xcr123. It's definitely not a thrower!
The fact that mine is the gen 6 version suggests there's been 5 less successful versions previously. Perhaps you have one of these earlier versions or maybe we have different tastes.
I also like the stock Incan bulb but battery life is poor in this configuration and the output is relatively low.