I just got mine... ok well I wrote a detailed review that took me about an hour and my computer crashed.. so i have to rewrite it argh! ok I will try to be as thorough on round 2...
My first impressions... the light design is fantastic, rugged and sleek, homerun in the design department. One handed operation is easy even with the extension tube. The tailcap and the side button work in tandem perfectly. The strobe can be activated always by hitting the side button when the light is off, which is an awesome feature for real-world tactical or hostile situations. You dont want to be scrolling though settings during a dangerous situation. Additionally, the memory feature is great, whatever setting you leave the light at when you turn it off it will stay following tailcap depression. Now here is my rundown on each setting...
At the lowest setting 8 lms is obviously very dim, but incredibly useful for certain low-light applications.
The medium setting is rated at 120 lms, it is seemigly not as bright as a Surefire E2DL rated at 120 lms. However, there is probably equivalent light output between both, just the M30 is floodier then the E2DL, which has a tighter hotspot.
The high setting rated at 700 lms is bright, very bright. However it was not as devastingly bright as I had thought it would be. Take this subjective comment with a grain of salt, trust me it is still VERY bright and will not dissapoint anyone.
The strobe is fantastic this is another home run. I am not sure what the frequecny is, but it is very fast I would guess around 10 Hz. This is much preffered to slower strobe, the fast strobe is blindingly bright and unbelievably disorienting.
The actual beam is tight with a good amount of spill. The MC-E LED temperature is much warmer than my Cree Q5, K2 luxeon, and my SC2 LEDs. However the warmer hue is better for some night applications and is easier on the human eye for seeing at night, so not a bad thing with a warmer hue. The characteristic MC-E cross is present within about 18 inches in all settings, however as soon as you are further away the beam is solid full and no evidence of donuts or crosses as is common with MC-E LEDs. There are very very minor artifacts in each setting, not a bad thing or distracting, just noting for the record.
Lastly, the diffuser is an awesome accesory, it provides a glow for many jobs that a bright focused light are simply not suited for. A truly essential accesory and I think you will find yourself using it more than you think. I also highly recommend a compatible nylon holseter I have the link several posts back. It fits the M30 perfectly even with or without the extension tube.
Overall this light is a homerun, it is rugged, incredibly verstaile, and will be useful in a variety of applications. The M30 is an amazing addition to anyones flashlight collection, and is essential gear to those who demand tactical level illumination in the harshest of conditions.
One last note I have not taking the M30 outside yet, I will do that as soon as the sun sets. I will try to take some beam shots even though my camera is terrible. If they come out at all I will post them, I know everyone is eager to see any beam shots.