Hotels
Freetown - there is only one at the airport, well down a dirt road, it's just too difficult to get to the city. The Airport Hotel is adequate has aircon in the bar and dining room and some work in the rooms (ask for the BMI crew rooms) Cold beer and some food ok. There is another being refurbed on the beach but haven't seen it yet.
Roberts Liberia - Hendeja Resort, costs a fortune but good, in fact probably the only one worth staying at considering security plus comforts and pool with the exception that some mobiles won't work, limited Wifi, nice beach with security.
Ouagadougou - try Libya Hotel (ex Sofitel) very good, pool, a'con and good wifi in lobby
Abuja - Agree with previous post, Transcorp Hilton is best, Sheraton is just ok