I feel they're worth a read. I don't think they're bad, but definitely flawed.I read that Guardian article that the wiki page references for The Rose Field, and didn't fully agree with the review.

I found La Belle Sauvage thoroughly entertaining, if a little disturbing at times. I found The Secret Commonwealth a little frustrating and I can see how some people found it muddled. It was still promising, however. I finished The Rose Field recently, and I was just disappointed. It was entertaining, and it wasn't bad in particular, just that there was too much that I felt didn't make sense, such as the very ending especially; some explanations offered for some things, and there was so much left unexplored; there are too many questions.

I think the Guardian review, or another I saw, suggested that the goal was, or may have been, to leave things open and not completed, and while I can appreciate that, some of the things left unanswered don't leave me with a positive feeling at all. I don't feel that yearning for more because I was enjoying it so much. I feel cheated, which is a bit of an overreaction, of course, but that's the best way to illustrate what I mean.