Criticism of the battery power, I can only share that is too weak!
Since everything is set and assessed over the rather large, and then asked on Bright outdoor display, you have to be like this objection at Canon.
But spare batteries not cost the earth, are small and light and I also have with any other camera which thereby.
Regarding the incidence of light on the screen, must therefore probably can always bypass the photographed using a mobile phone or with cameras without a viewfinder. Since you have just Trixen.
At first I, triggered a number of times through contact, accidentally, which can be avoided but by hiding the displays (INFO.Taste).
The two things can criticize you, but they are probably the compromise (in addition to the compact flash) you have to take at the size and weight of the camera, or you let it.
The flash is incidentally operate with separate batteries or rechargeable batteries, ie not at the expense of camera batteries.
The pace is about to my compact camera, in terms of autofocus and settings.
Something bad, I find the connection for a wired trigger missing, which I think is accurate.
An app that makes my table or cell to display the 7D, with settings and tripping, unfortunately does not work in M. Functions and camera name is indeed displayed but unfortunately the screen remains black (perhaps a problem of APP).
I am satisfied with this camera, which is, however, also lie in the fact that I of accessories, from infrared remote release via lenses (requires optional adapter) and flash can be anything up to the software, my previous equipment use.
But you bring me another advantage!
The 7D, my "big", although can external flash (compatible of course) trigger on radio, without plugged flash but not in high-speed mode! The small flash of M, placed on the Large, solves this problem and this is how the other flashes free place in the room and the small can be covered when its light is not desired.
I think that, this camera concept is not so much aimed at the traditional holiday and family photographers as more of those who want to play with it, as I did.
Thus, for me, speed, battery life and, not least, the compact flash (one has to know when you need him, even outside the 4Wände) synonyms for it.
This may explain why several stars are deducted here. But what more points to an exaggerated and disappointed expectations, as to an inadequate product.
And if they still against a Vollformartkamera how the EOS 5 Mark III, fielded (greeting Traveller A340), I think that's very wrong!
But well, here everyone can just get rid of it all, I indeed.
My DSLR can not and should not replace, but rather complement them. And it does.
The M is used in places with less light, such as in public institutions, at work, in homes, where the Great is misplaced and lightning ruin the atmosphere or the picture more.
The fairly good results at high ISO values goodness!
I have set photos.
What does the poet mean to us now?
The EOS M is not a reflex in miniature for all occasions!
Rather, I see it as, well, compact camera with a larger chip and therefore better performance when the sun is not shining.
In the end, like what I wrote, listen for one or the other, much like per Canon, but I have nothing to do with the company. However, a certain love for the cameras I can not deny, after all, they have never let me down.
Of the printers of the company, I can not say, but that's another story ...
Would be glad if I could help!
Postscript:
In everything I said in my reviews external is my very subjective opinion as Anwender.Sie refers solely to the product which is present to me!
Misjudgments by own inability are not excluded! In such a case, I hope the community!