I enjoyed this series so far, as a person who read the first six books but gave up when it got too complex and impossible for me to follow. Season 3 definitely has been the best though, clearly better television even aside from anything in the books (and I can't remember anything from the books, so discontinuities from the books don't bother me at all).
Curious: how many seasons will this go if it tells the full story? Assuming they skip over some of the middle of the series that really drags, could this be a 6-7 season show? I can't imagine it will be renewed for 12 seasons or whatever it would take to go one book per season...