I've just finished working in Mauritania. The conditions are generally much better than most of west Africa. It's very hot (up to about 45c), but generally very low humidity, so it's not too bad. The evening temp is just right for a BBQ.
It is an Islamic country, but you can get alcohol, although it is fairly expensive.
There are a few resonable bar/restaurants in town. They are generally Pizza/steak/pasta places.
The large supermarkets stock a very good selection of western items, but again, these will cost a lot more than in Europe.
Overall, I found it a very nice place. It is safe to travel about during the day and night, with no danger of being mugged or robbed.
The only problem comes from the standard of driving. It is a free for all on the roads.
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