There’s perhaps not much to say about this collection: it’s much the same as the other New Scientist collections, in that it brings together a number of articles and features on a theme, using material from past issues. This is a bit more general than The Human Brain, of course, though it covers some of the same ground. If you read New Scientist religiously, none of this will be new to you; if you want to collect it in a more permanent form than the weekly issues, or grab one that’s on a specific topic, these are great for that.
To me, all of this is accessible, well explained and interesting. Your mileage may vary depending on what aspects of science interest you most.