I just returned last week for the 6th visit and I can assure you that you will have a wonderful time. The staff is extremely friendly, more so than any other Starwood property that I have stayed at. The ride from Banul Airport to the property is about 15 minutes and should cost about 300 dalasi which is about $11.
The property has a new all inclusive deal which gives you Breakfast Lunch and dinner including drinks for 1000 dalasi and it is well worth it. The guests are also quite friendly and mostly from the UK.
Let me know if you have any other questions as I know The Gambia very well and can hook you up with some fine out of the way places
Have a great trip