It is a nice light. I have the M10i. It is a little bright for what I need most of the time with the narrow optic. This is basically a twisty light with one brightness level (for the most part). I like the wide optic beam, it's very useful. I do think the current settings for high and low are not that useful. A lower low and a lower high would have been better I think for a light this size. The lanyard is cool. I wish I would have bought more than one so I could keep a different optic in each one. The only thing I do not like is the flat oring design. Kind of a pain to work with when changing optics. I would buy a second one but am holding out for their cree version (hoping really). I am hoping for a m10i cree with a high low switch at 100ma and 700 ma (may be dreaming). I have EDC'd it on and off for around a month total. I switch out my EDCs every few days.
What other lights do you have? I could give you my opinion if it would be worth while to get it. You may hear people telling you to wait for cree. That usually means only if you want brighter with same runtime. I have not seen it used for same brightness and longer runtime (except for the mizer PD and they can not be gotten easily)
Good luck,
rob