I assume you mean a Tasklight 3AA Luxeon....
If so, I have one. And it's a great little light.
Brightness is about equivalent to my 4 x D Maglite with the EverLED drop-in bulb replacement. It's also much whiter than my EverLED or Epeion, both of which have a slight (more than slight on the Epeion) greenish tint.
Throw has been adequate for anything I've tried -- general household chores as well as drills with my volunteer disaster response team.
I haven't had it long enough to have a feel for runtime. It's still on the original batteries, with probably no more than an hour or two total usage.
The only downside is that it isn't current regulated, so the light output will dim over time as the batteries discharge. I have two of the UK 4LED lights on order, which are regulated, and should receive them tomorrow. I understand the Streamlight is brighter, but with regulation I may end up liking the UK better. We'll have to see.
Oh, and durability. The Streamlight is made of heavy machined aluminum, and is probably indestructable in normal (and even abnormal!) usage.
The Streamlight was sufficient to impress my non-Flashaholic friends. They all wanted one, until they learned the price!