I found them reasonably enjoyable. I don't think it helped that my expectations of a Commonwealth trilogy were set by Pandora's Star & Judas Unchained, though - Void wasn't at the same level so there was a slight tinge of disappointment while I was working through them. I'm likely to skip the Waterwalker sections if I go back to them in future. Unhappy with the ending though (it reminded me of the the ending to Night's Dawn in a way - needlessly godlike events happening).