This one is difficult to review because, while I didn't enjoy it necessarily, I found it compulsively readable and I think it will be one that will remain with me for a while. Telling the story from the perspectives of both Rivers (real historical person) and Prior (Barker's creation) gave an interesting blend of reality and fiction. although I enjoyed the perspectives of these two men, I found the secondary characters extremely hard to keep track of, with similar names and barely any physical description provided. which I guess was probably a lot of The Point, in terms of the anonymity and loss of individuality in war, as Prior ruminates on towards the end of the novel.
I haven't read the previous two books in the trilogy. I picked this one up after watching the film Benediction about Siegfried Sassoon, and finding out that Pat Barker had written a novel in which he is one of the main characters. I saw this one in the bookshop a few days later and thought they were the same, but the one I wanted was Regeneration, the first in the trilogy. I still want to read that--I think Barker's version of Craiglockhart and the psychological impact of war would be very interesting. 
Overall, I feel that this book, for me, could be anywhere from a 2 to a 5 star book, depending on how I'm feeling. I didn't love it, but I felt genuinely emotional throughout, especially in parts 2 and 3. Certainly one that will stick with me, especially if I'm reading or watching anything related to WW1.