Being one of the many gamers frothing at the mouth over the talk of an open world, zombie apocalypse sandbox game, without all the "missions/quests/story" crap to trod through, I have to say I'm massively disappointed in DayZ and the entire Arma experience in general.
I'll give it more credit for being based on a "military simulator" type engine, but for this gamer, the whole "sim" thing does not make for fun at all.
The controls are just plain horrible and too demanding in a "You'd better have gotten a PhD in keyboarding or go home" feeling. There are just plain TOO MANY movement commands. It's baffling to think anyone needs this many different types of "crouch+/-prone".
The menus and UI are all totally unintuitive and the most unwelcoming aspect of the game in general, or any game I've played ever.
Hopefully there will be a good deal of changes to make it more welcoming to real gamers, because as it stands now they can take this whole "simulator" schtick and stick it.
Someone will get this whole "sandbox zombie apocalypse" thing right, and I'm happy to see the competition ramping up between DayZ, The War Z and the upcoming Walking Dead game which will hopefully be open enough to goof around in for weeks on end at least.
TL ; DR DayZ sucks hot ass in the shape it's in so far, just mho.