I finished A Dance with Dragons last night. I have mixed feelings about it. Parts of it were quite good, but I felt the book was rather padded, with alot of pages that didn't really add much to the story. I felt this way about A Feast For Crows as well. It's still a great series, and still worth reading, but IMO, the series seemed to have peaked with A Storm of Swords. Here is how I would rate the books:

A Game of Thrones = A+
A Clash of Kings = A
A Storm of Swords = A+
A Feast for Crows = B-
A Dance with Dragons = B-

I'm still a big fan but I hope Martin ups his game in future novels.