I was attracted to this novel by the name of the author and the mention on the front cover of the Booker Prize.
However, it took an effort of will to stay with the novel all the way through to the end. This was because the balance of action seems wrong, with 80 percent of the book building up to the critical event that speeds along the rest of the novel. I would have preferred to see the critical event arrive after about 60 percent of the novel. As it is, it demands a lot of patience to wait for the "other shoe to drop." After finishing the book, I had to re-read the first chapter in order to track down the small clues that explain much of the action in the closing part of the novel which ends with a predictable denouement.
On the positive side, I liked the very under-stated irony of Welsh / British humor that is unique and sorely missed by expatriates. The many aspersions cast on the Welsh character are very funny. These were new to me as an English person with no prior knowledge of Wales beyond a one-day visit to Anglesey!
I also was moved by the quiet desperation of older people who have retired, lost their purpose in life, and grown weary of marital routine and fragile friendships. After finishing the novel, I was struck by the misery that underlies so much of middle-class life.... Probably it is this searing look into old age and its loneliness that won Amis the Prize. Certainly I can't bring to mind any other work that deals with these topics and this type of older population.