Having read the other reviews, it looks as though most people didn't like getting sidetracked by the whole Anderith subplot. To be honest, I loved it. It was certainly a refreshing change, although it did seem to make the book slightly out of place with the rest of the series thus far.
I didn't find that a problem at all. And whilst the Chimes were never 'tangible', per se, I don't think they were ever meant to be the major "bad-guy". Instead, they were just something that Richard had to deal with instead of getting ot the root of the problem.
So that wasn't my problem either - what was my problem, was Kahlan (and possibly Cara, too).
After all that's happened in the previous books, after everything Kahlan has been through not just with material enemies, but with good and bad spirits (like Darken Rahl and the ever-present Keeper), she decides, for some reason, that she isn't going to believe in bad spirits anymore, and rubbishes Richard's worries about them. Even when people die mysteriously, and when she's given all the clues under the Sun, and a man who seems to be able to understand and accomplish everything ever possible (Richard) warns her, she still doesn't believe.
That was truly apalling story-telling.
But it gets much better towards the end. This may not be the best in the series, but I enjoyed (most of) it nonetheless 8)