To be clear, I only got three episodes in...so my review is based on that. I knew of the books, the fan base and the potential given the cast, crew and production budgets.

If you love this series, then great, but here's a few of my thoughts:

Script felt surprisingly simplistic and obvious at times. If this is true to the book, then I'm a little surprised.
Editing pace felt rushed, almost 'clipping' scenes at times; like they had to find the room for all the content they wanted to include.
I really liked many aspects of Sheen and Tennent's characters, but found Tennent's character 'hammy' and repeatedly poorly scripted.
Overall, I wanted this to be good, but it just didn't land for me.