I used this guide exclusively to travel around The Gambia.
The guide falls below the usual standard I have come to expect from the LP. The descriptions are good & as a basis for choosing what you want to see & do in the country it is quite good (I thought the maps were excellent).
Where it falls down is on the detail, despite being published in Sep 2009 the prices were usually incorrect (higher & lower than listed) & the majority of phone numbers (that we tried) were not in service due to the general switch to mobiles. Also the description of the road infrastructure is out of date as there are considerably more sealed roads than the guide implies. For such a recent publication there were far too many errors & sections that were blatantly out of date.
Overall its OK, but don't rely on it to get you round the country, if your going to just The Gambia I think Bradt do a stand alone guide which may be more detailed & specifically researched?