I gave the book 4 stars - mainly because of the content being general rather than specific.
What I didn't add in the short review:
The maps will probably be very useful to me in the future as will the timelines at the back of the book. What I forgot to mention in the review was that the book was very well written, well edited and readable for the non-expert, i.e. an interested dabbler as I am. I liked the inclusion of the translated sources from the ancient historians.
I'll now focus a little more on my ~TBR fiction pile of books till my next Roman Britain book pops through my letterbox. No, I can;t stop buying more and more information on the subject of my obsession.