Well, I just finished it this morning via Netflix.
Overall I thought it was excellent with the 4th season being my favorite.
It was a satisfying finale which is hard to pull off on any "great" series. I hated Walt and loved Jesse from nearly the first.
An interesting part for me is when I hit play this morning for the finale, I was ready for it to be over. I didn't have the sadness I have for the end like some other shows or even great books. For me, I think that puts me in a camp of I thought it was great, but by no means one of the best series ever made. Blasphemous words, I know.