I'm absolutely LOVING my EOS M.
I had read about the following things, and I agree with them 100%
- it's not quite a pocket camera, even with the 22mm pancake lens
- battery life sucks
- Magic Lantern really opens up the possibilities
- video is quite shaky with the non-is lens
And some things the surprised me:
- it's a super solid feeling camera. It feels heftier than it looks.
- I don't miss a viewfinder
- the touch screen is awesome. VERY useful. I'm not going to miss it on the my T3i.
- a 22mm lens is fantastic on this thing
- it can take better quality pics than I can
- menus are incredible and VERY intuitive. Short learning curve to navigate the menus.
- 10x zoom on the LCD is awesome
Some things I don't love:
- manual focus feels really weird
- I have to remember to turn off autofocus during video, or it hunts around for focus and subjects go in and out of focus
- the af is plenty quick for my needs (except for moving subjects in video mode)
And a few amateur pics I took with it this weekend: