If we are talking about an Ex Army Unimog, unless you have driven one, you can't really comment.
Yea, they may go everywhere. If your anything over 5"8, then get use to your knees sitting against the dash board. Being a cab over, you feel every bump in the road. With the cab sitting on top of the engine, with no insulation, it's gets real fkn in the cab. No air conditioning doesn't help either.
Noisy as buggery, hot as fk, no insulation, gutless, and unless you want to use it as a farm truck only, pretty much pointless for anything else.
Unless you strip it back to the chassis and rebuild it with some mod cons.
But for that price, you'd be better off buying a Hino or Cantor if you want to throw a house on the back and travel Australia.
Last time I drove one, driving from Brisbane to Townsville, by the time we hit "The Ville", I couldn't walk due to spasms in my lower back.