Pros
Big titles up front. Big responsibility up front. Decent pay in Africa (not compared to other companies operating locally, but compared to the US or EU). Opportunity to learn new things. Rumor says the main offices (Paris, Berlin, Porto) are better. No personal experience.
Cons
Imagine the worst possible qualities of consultants. Then imagine a company entirely run by former consultants. Then imagine it's a bit worse. That's Rocket Internet. Horrible management skills. No life work balance. Pretends to be a "lean start-up" to the entry-level employees while the founder is a multi-millionaire, and the leaders are paid obscene amounts of money. HR department non-existant. Good luck figuring out taxation, labor laws, exchange rates, contracts, etc. No logistical support for expats, bad conditions compared to other international companies. Horrible company culture of backstabbing and political shuffling, you need to constantly been on the look out. Implicit racism towards the locals. The entire salary structure is ethnicity based: Western Europeans/US people get one package. Eastern Europeans get another. Indians/Pakistanis get a worse one. Lastly, actual African talent gets zilch.