I think the most crappy expirances are in the US ans some high traffic areas.
You can usually tell by reviews and crazy rules. I once tried to book in Italy and was asked to bring my own linens. So that was a no.
In general there is deals to be had, but a little common sense goes a long way.
A zomie hord tower defense game that lets you choose google maps as playground.
Imagine defending your hometown, or downtown Munich, Hamburg, London or Paris.