Well no-one's read the entire series as it's not finished yet.
But I get your meaning - I actually stopped after book 10 and haven't read the latest one yet, which apparently is more of a return to form.
Basically my feelings are that the first two were pretty ordinary, books 3-5 were good, books 6-7 were ok but starting to grate and books 8-10 were pointless and did little to advance the story.
I may return to the series once it is completed just to "complete the journey" as it were.