Got my M22 a few days ago and got to play with it outside a bunch tonight. I love it.
I played with it side by side with my Klarus XT11 XM-L2 and a Crelant 7G5v2 that I really like. I have been carrying the XT11 in my computer bag every day for the past couple months and have been very happy with it. However, after comparing it side by side with the M22, I will replace the XT11 in my bag with the M22.
The main deciding factor for me is the beam profile of the M22. It throws really well for a smallish light, but has generous spill also. I also really like the UI. In my experience, with this type light, I tend to use either low or high. So, I simply set the memory for the light to come on in low, but can easily and quickly access the high with a double press of the switch. This is nearly perfect for me and is something the I always gripe about with the XT11 (no memory or option to come on in low with the XT11).
In the end, if you are in the market for a single 18650 multi-purpose light, I highly recommend the M22. I got mine for $70 brand new with all accessories and would buy it again in a heartbeat.