I have the MC11. If I haven't used the light for a while, it is the hardest of any of my lights to remember the UI :duh2:
The new model turns on immediately with a quick click, changes modes the same, but you have to hold the switch down for a second to turn it off. Again, odd !! ?? If one doesn't get the rhythm down correctly, it can be frustrating.
In spite of all this the beam color and profile are very appealing, to me at least.
I purchased one of the very first issued 2014 burst MC11's. According to a Fenix vendor I spoke with, the very newest packaging (produced within the last month) no longer includes the flip-up plastic diffuser, and now must it be purchased separately. However, I'm not certain it's any big loss as the plastic diffuser included in my package is on the flimsy side and sure to break within short order.
One would think with all the flaws I've cataloged, I'd be "soured", but something about the beam profile holds my mind with it's elegance. I find some flashlights are easier "to make peace with" than others.