Andrea It's a commitment. I read pretty fast and devoted way too much time to it so I got through it in a few months but I have read people taking years. There are definite periods and books that are not as good as others and the last two written by Sanderson are definitely paced differently (which is good because Jordan probably would still be writing out to an ending). But overall the series has some incredible payoffs that are many books in the making.
Most fans hate the show and I am fine with it but it does not follow the series very well (but how could it). But I feel like the story actually fits in the framework of the story in a way.
I want to recommend the Kingkiller Chronicles but I feel like it is less likely to be completed than ASOIAF at this point and that is saying something.