I have the T7, and of the 10+ LED flashlights I own, this is the best built. You can tell that they a lot of thought into the physical design. As advertised, the beam is one of the smoothest available with very good uniformity. You'd need a CREE T6 LED to achieve a smoother pattern. The focusing mechanism is nice and tight, and the included holster is very sturdy.
There are a few things I don't like though.
- The switch has no memory. It always turns on with the High setting. Many other LED flashlights remember your last setting.
- Boost mode is somewhat awkward to use. You have to hold the switch halfway down, which is not easy for a tail switch since you can only use your thumb. Once you let go, or press too far, you go to the next mode.
- Boost mode is somewhat gimmicky since it's barely brighter than High (175 lumens vs 135 lumens).
- You can't use rechargeable batteries. The instructions claim that rechargeables can damage the flashlight. While it's true that NiMH batteries are rated at 1.2v (x4 = 4.8v), a good regulated LED circuit should be able to boost that to the 1.5V (x4=6v, at the expense of battery life) of alkalines. I've actually never heard of an LED flashlight not being able to use rechargeables before.
- it uses 4 AAAs as opposed to 3, which most flashlights use.
- battery life is relatively short at 1 hr at the highest setting.
- there are relatively few modes for a high end flashlight (this was around $120 when it first came out!). This only has Hi and Lo, and a gimmicky Boost mode. Many $10 flashlights on eBay have Hi, Med, Lo, SOS, Strobe (for blinding). You can only find these modes on Lenser's higher end models.