Asky is very reliable and usually on-time. I have noticed they have an issue at their LFW hub with badly overbooking flights, denying boarding, and then stranding passengers in Lome for days but I have never heard of any issues with their fifth-freedom routes around West Africa.

Here is an Asky trip report from 2010 OUA-COO:
http://www.airliners.net/aviation-fo...d.main/176025/

Here is one from the same writer about Air Burkina on BKO-OUA:
http://www.airliners.net/aviation-fo...d.main/175214/