This hotel has a a big advantage for the person who wants to swim or relax at beachside, or perhaps take a quick easy day trip to Ngor Island for some seafood and a swim on that island. The view from the hotel window is also probably the best in Dakar.
On many fronts the hotel is average. It is an old hotel past its prime, and the some of the facilities (ie bathroom) were working fine on my room but not highly rated. There are a lot of new hotels in Dakar so if you are looking for attention to detail and luxury this is definitely not the place.
The real advantage is the private beach, with paillottes for shade and paddle boats and other stuff for rent for fun in the water. There is a very busy public beach right next to it. I think the pool is pretty nice too, with a poolside bar and resto near. And the 5 min boat taxi (around $1) or even a 1000m swim over to Ngor Island makes a nice adventure to kill a few hours.