So, Just played a couple of Hours standalone Dayz.
Of course as its beta its missing items, Bandages, Flares, Tents, Some Weapons , Animals ,Vehicles,Vehicle parts, Barricades are some i can think of. The Zombies are VERY rare, i saw less than 10 in total, they still sound the same and move the same. The game generally is the same as the Mod, sounds, map seems similar but there are new buildings, some old buildings which had items now don't, some have doors which they didn't before and more buildings are accessible. I played on a 40 man server and ran north, 2 chaps i ran in to at the Radio Tower allowed me to pass, further north at another encounter someone with an m4 tried to shoot me, but was taken down by another chap also with an m4, so generally its been friendly.
Ive had no game crashes, just 80secs no connection errors which can set you back.