You'll love it. I have been certified for years and am a PADI Divemaster. I was stationed in Cuba at GTMO for a year and dove the many reefs there, they were great.
Also, I have dove that same rock quarry in IL, (Mermet Springs), its okay for around here, but is very cold (to me) even at shallow depths. (A dry suit is a must).
Enjoy. BTW, I am in the KY Guard (438th MP) how did you get a tour to Africa?