Wow, all this negativity is surprising for me.
I never read the books and watched the whole show this year so this is my first time entering this thread.
I can understand that it might be disappointing to fans of the book if they made lots of changes or whatever, but to someone like me the show is absolutely mindblowing and definitely one of my favorites ever. As much as you might disagree with the direction they're taking vs the books, on its own it's a fantastic show.
I've read the books, and have watched all four seasons, and I think the show has been fantastic. I may be a little disappointed by some things here and there, but overall, I'm loving this adaptation. I think the cast and crew and showrunners are doing a fantastic job remaining as true to the meat of the story as they can given real world things like time, budgets, actor availability, scope, etc. It's a huge undertaking, and for four seasons, they've performed more than admirably. This show could have been a clusterfuck in the execution, but it has come together so incredibly well.
I can't help but be pleased. We're still 3 seasons away from the end. That's another 30 hours of story they have to tell. 30 hours is an insane amount of time remaining, truth told. Especially when you consider most scenes in television are roughly 1-3 minutes long tops, with exceptions of course (the Purple Wedding was amazing. 20 minutes of one scene, but you didn't realize it was all one scene because the execution and build up of tension was so well done).
I don't know what Martin has planned for his last two books, but I think 30 hours of television remaining will be enough for the crew to do this epic tale justice. Nothing is perfect, and there are certainly stumbles along the way (as there are stumbles in GRRM's books as well), but this has already been 40 hours of great television for me so far.
EDIT: And Brienne vs The Hound was one of my favorite moments in the entire show outside of the Red Wedding. That fight was brutal, and just amazing to watch. My wife, who hates the show, really enjoyed last Season, with the exception of The Viper vs The Mountain (understandably so. lol).