I've always been a fan of Tony Parson's writing, and My Favourite Wife has been the only disappointment so far. Other reviews have covered several flaws, but here's my take on it:
The "feel" of Shanghai is great and though I've never been there before, having visited Hong Kong I got a real sense of authenticity about his writing. You can almost smell Shanghai through this book, but the problem is - as someone else mentioned in their review - it appears Parsons forgot about the human story.
Much of what happens is predictable and doesn't make sense. I found myself growing more and more irritated with the central character, because he's just not likeable, neither are almost any of the other characters in the book. It's a simple story that's really drawn out (far too much in my opinion), complete with the obligatory family death, the conflict of conscience in a (basically) unethical job, all neatly wrapped up in "doing the right thing" finale.
Overall I found this to be quite readable, however it's predictable, it's not at all funny, and it's actually quite depressing with a final act which doesn't really satisfy (and don't get me started on the flood section...I thought I'd just jumped into another book, it was so jarring and contrived).