This is an adequate guide, but was disappointing in a few areas. Firstly, it is not geared to someone making a comprehensive West Africa trip but rather reads like a collection of individual country guides. It's OK if you are going to just fly in a hang out in a single country, but information about planning cross border itineraries is very thin. There could be better integration for the area.
Secondly, using the maps and references to them is a bit taxing. Place names that would likely be obsure to the reader are presented in the text without specifying country or area; the only way to figure out where or how is to scan maps randomly for some idea of specifically where they are talking about. Place names are often referred to with different spellings, or more colloquially, in the text than on the maps, making finding them once again a tiring guessing game. There is a lack of consistency. Beyond that, the maps are small and lacking in detail. In other words, you can sort it all out, but this guide makes you work harder than you should have to. You get the feeling that it was written by people who assume you already know the area well, and that it needed to be proofed once more.
I agree with the accusations of ethnocentrism mentioned previously, but I've grown used to it in LP guides, and in a way appreciate seeing the author's predjudices up front.
Use this guide and you'll have a fine trip, I think, but you'll spend too many hours wrestling logistic details from the text when you could be perusing the fun stuff.
I use LP, Rough Guide, and Moon guides alternately when I travel. Actually, I usually buy all three, study them all before departure, and take the one I think is most useful. I have not found any one brand to be consistently better or worse, it varies by area and author. In this case I think the Rough Guide is much better. It very neatly addresses all my reservations above, and with a better layout.