Having worked in different places in Africa my best advise is to get all the info about it from as many different sources you can (Google it as well as ask on these forums).
Depending on your personal circumstances then make the decision if what you will be getting out of it (i.e. twin type rating, command, money) will be worth it against the risk that will be always a factor with working in Africa (i.e. security, health risks).
It is only you that can make this decision and if you decide to work there go with an open and positive mind, use common sense and be streetwise (something you now also need in most Western city’s).
Good luck with your endeavours, whatever you decide,
Finalchecksplease