When we were orphans by Kazuo Ishiguro - any thoughts on this book?

Just finished this and have no-body to discuss it with!

I felt that Christopher Banks was mad, and that most of the second part of the book was part of a fantasy dreamworld. The clues began with his strange way of constantly looking back - everything in memory, but those memories often tainted. Also, a number of people angered him by remembering his charactor as a child differently to as he would like it remembered. At one point Jennifer insists she is going to 'help him'. I think she was referring to his mental illness - not his quest. Clearly his parents would not be in the war torn house after 20 years. Also, why did he suddenly end up in his old house after meeting with his school friend? He never seemed to ask why this had suddenly happened - again, a twisted time frame and concept of reality.

Any thoughts?