I recently spent a few tours there. It's not bad as West Africa goes. Better than PNG I dare say.
1. Cops are corrupt and try to shake you down for money sometimes. This seems to be getting better.
2. Base management is pretty good.
3. Money is very good considering it's not that bad a place.
4. You must take anti Malaria medicine as a condition of employment.
5. Three or four stores selling European food.
6. reasonable restaurants and bars.
7. Accommodation is a crew house which when I was there was having ongoing problems with air conditioning and electricity. But clean and with sat tv and internet.
All in all not a bad place as CHC Global goes.
As you fly out to the field you can see ( on clear days) the Nigerian field which is always a good reminder of how bad it could get.
I would go back to Malabo.