Pros: - Very bright. Just about as bright, if not more than my 100-Lumen Surefire. So I would estimate REAL lumen output is around 100-110.
- Tightly focused beam. Dot is very tightly packed and has excellent throw. Dot is also very clean looking, no abnormalities in the beam quality.
- Great looking host. Probably one of the best I've gotten from DX. Very clean, fluid and sharp looking. Not awkward in the least.
- Great knurling.
- Easy disassembly for replacing/exchanging internals.

Cons: - Paint chips off very easily when dropped from low heights on hard surfaces.
- Sometimes (very VERY rarely) has trouble making connection, have to shake a bit every now and then to make it work.

Other Thoughts: Reverse clicky. Heats up quickly (though not a bad thing, just shows it is powerful).

Bottomline: Great light with a lot of power. Use rechargeable RCR123's for about a hours worth of light, maybe more. Great host for other emitters if you can find any that are brighter.

Pros: great light, super bright ...cover large beam area at 15 feet..construction is good battery is snug ...no rattles

Cons: short on time ....after about 30 minutes of total usuage light just cuts off...not like a regular light that just goes dimmer..can someone tell me if this is correct? the batteries im using are: TrustFire Protected 3.6V 880mAh 16340/CR123A Batteries (2-Pack)

Other Thoughts:

Bottomline: great light for the price ...going to try a Q5 type next time ....can anyone tell me how much brighter the Q5 would be ?

Pros: Bezel looks good. Nice to hold in the hand. Good quality lanyard attached. Can stand on it's face.

Cons: Not bright at all. Very disappointing build quality and very poorly finished. Some 'scratches' in case and anodizing very thin. Quite sharp around the edge of te bezel. Too much play ion the clicky before it connects.

Other Thoughts: No holster provided which, at this price is surprising. There are too many niggling quality issues to have just have received a sub-standard model. I would be interested to see other ultrafire products.

Bottomline: This is not a bad flashlight but it's not in the same league as, for example, a Romisen RC0F4. Since it's also more expensive than the Romisen there's no contest = I can't recommended this flashlight. Hopefully this is not representative of other products from this manufacturer...

Pros: I received it, and the first though was: "This is smaller than I thought." It was decently built. It looks and feels real solid. The light is bright enough (Hint: Don't stare in directly...can't see now...) only i wasn't able to test it fully (read cons.)

Cons: It doesn't fit ANY of my 18650 batteries. I was able to test it by just tearing of the plastic of one of my batteries, and connecting it to the bulb and the spring. Which worked fairly well, meaning the spring makes good contact with the battery.

Other Thoughts: Because it doesn't fit an 18650 as advertised, I've given the build quality a 3 star. If they just made the tube 1 or 2 mm larger, it would surely fit without a problem. I've contacted DealExtreme to ask for another model which does fit the 18650, and send this one back. Waiting for a response.

Bottomline: Don't purchase this if you plan to use it with an 18650.