Funny thing about ARMA is that reading about it, or even watching vids, is far more entertaining than actually playing it. Mostly because of this shit-engine, clunky movement, horrible bugs, lagging, desync, ridiculous controls design, really bad effects in some parts (try blowing up a building) and lack of any sort of reasonable physics, which is quite surprising considering it's supposed to be a realistic game. Saying this as a long time OFP/ARMA/PR player.
Unfortunately ARMA defects completely ruin DayZ for me, yesterday I actually rage-uninstalled the whole thing after a zombie started warping all around the place and eventually killed my character.