It's not bad. They changed the internal design around 6 months ago and the only reliabliity problem I know of is that the brass pill is in 2 halves now and when they are screwed together there can be too much tension in the wires from the driver to the LED and can come adrift.
The light is fairly floody and I'm not sure about running it with 4x16340 cells.
A few bucks more than the other and a better emitter. However it does say "Digital Regulated 1500 mA Current Output". It wont be anywhere close to the 1000 lumens claim. I never really dug into any "dive lights" to comment about the waterproof ability of it.
The size (~50mm) will help throw, the OP (orange peel) finish will hurt throw.
With the 1500mA current level, you could even drop an XP-G in there for MORE throw....add a bunch of heatsinking and an XP-E, and I bet you'll see 50000lux
I have the MC-E version of that dive light. The coated lens reflector is just Chinese gibberish. What is a coated lens reflector :) It has an OP reflector. Throw is a little better (tighter) on the MC-E version.
These lights put out about 500 lumens. It has a magnetic control ring. I don't know how you would replace the driver/emitter as some are mentioning. I wouldn't get this light if you are planning on changing anything...what's the point?
It is a dive light. It's waterproof although it could/should have a thicker front lens but I use it (MC-E version) as my main dive light and have had it down to 120 fsw or so. Due to the 2.5 mm lens I wouldn't trust it much more than that.
If you aren't going to use it as a dive light I don't know why you would want this particular model.