CM,
Depends on how much you can drink
Seriously though, the allowances are pretty generous and based on the cost of subsistance at each individual place we stay. Since the hotels we stay in are generally of a quite nice standard....the meal prices are reasonably expensive and this is what the money is worked out on.
Venture outside and you instantly reduce your outgoings whilst retaining the same income so to speak! In a year and a half with the company, I have never been short of money whilst away and have quite frequently brought some home. That includes trips where I have done all sorts of activities from skiing to skydiving!