Steer clear of it....
I wanted one, and I can afford to buy one, but..... that was before I found a few threads on CPF from a bunch of unhappy U2 owners. It was blatantly clear that the vast majority of CPFers who posted had problems with their U2s. (Mostly with the tailcap switch).
Sorry, but Standard Operating Procedure shouldn't be having to send in your U2 for a replacement tailcap switch. I've also heard of problems with the selector ring, and the head itself.
Considering the price tag, the sheer number of U2s out there that need to be sent back for repairs shortly after purchase.... Its an inexcusable situation. Save your money for cheaper, better lights.
BTW, I own 5 Surefire's myself. The worst problem I have with them is a slightly stiff tailcap switch on my C2. The U2 really should have been recalled by Surefire.
I'm not at all sure about some of that (and I have had a U2 for about 6 mos and haven't had any problem at all with it). "It was blatantly clear that the vast majority of CPFers who posted had problems with their U2s" has to be carefully read to understand it doesn't mean at all the vast majority of U2 owners have problems, which they do not. If a thread focuses on problems, then I'm sure the majority of posts would indicate problems. I think the tailcap problems were primarily the older versions, I'm not sure it's still a significant issue (it definitely is not "standard procedure" to send your U2 in for tailcap replacement). Many were resolved by tab adjustment, switch lubrication, and SF did send out some replacement caps without sending the light in.
I don't think there has been any more problems with the heads or selector rings than problems with other sophisticated lights, all lights have some problems with individual units.
Sure, you shouldn't have problems with a light that costs that much... but then again you shouldn't have problems with expensive cameras, expensive cars, or any other item that's considered premium... but folks do, nevertheless. :shrug:
It's a unique light, remarkably flexible and useful, with nice beam qualities, and mine is a nice white color with almost no discernible shadow ring on a wall (definitely not in use). It's not for everyone (what is?), but I would guess the vast majority of owners are glad they have it, and some who have sold one sort of wish they had it back. A Cree version might be nice, but then again the one I have is nice enough for my purposes... I'm perfectly content with it.
The worth of a specific item is a subjective evaluation, and like many other things, if you want what a U2 does... that's what it costs.
Take care... Quinn