It's actually pretty much the same for all the companies out here. There are just minor differences as to whether you have to pay for your food (Gulf, ADA) or whether it's provided (Aramco).
In most of the countries booze is available if you want it and the cities and shopping facilities are good/excellent.
Housing standards vary tremendously. Gulf has very good accommodation but you'll need to buy a car as they don't provide transport to work for long. ADA has accommodation that's a health hazard, but at least there's a free bus service to work.
The flying is mostly standard boring offshore stuff, with Gulf mostly doing straight out and back crew changes and ADA doing a mixture of crew changes, wellhead hopping and slinging between wellheads.
Maintenance in all is pretty good and ADA does a lot of third party work, including overhauls for Gulf and Aramco as their engineering facility is excellent.
Managament in all is poor to lousy and as for the pay - the whole of the Middle East on the helicopter front is full of promises of the huge (up to 35%) rises that are impending as a ploy to keep us here, but so far none of the operators has been the first to break the lousy pay mold. It depends a bit on where you live, as most of the currencies are linked to the $US, so how that currency is likely to vary compared with your own is also a factor. In ADA, for instance, they may quote a rate in $US, but you'll actually have to open a local bank account and what you then do with the money is your responsibility.
Quite a few of us would like to be able to do the same as SASless, but it's not very many who can find good jobs in their own countries if they have spent many years overseas. The other problem out here is that there seem to be quite a lot of pilots who need to 'get a life'. The companies are actually short of crews, but there are always guys who have nothing better to do than volunteer for continual 'workovers' and as long as that happens there's no incentive for the companies to pay extra to recruit new crews.
However, if you're happy with the salary, Gulf is not a bad place to spend a few years in the sunshine.