My first one was a "greenie", which was promptly replaced by BrightGuy. This one is the purest white Luxeon I own.
Very focusable beam, MUCH more throw than my 3AA SL Lux, a tighter beam all around. The workmanship is superb, nice knurling.
It is the same length, same bezel diameter as my SF 6P, the TL-2 has a slightly smaller light barrel. The clip is useful, and removeable with a small hex wrench. It has a recessed clickie which prevents most inadvertant unwanted "ons".
It is not regulated (which I prefer) so should give many hours of useful light, and then you can change the batteries at your own choosing. It is not terribly over driven (see below post) so it shouldn't surprise you with a puff of smoke.
I think I'll get another for my wifes car.