At Ep7 or so, and it's better IMO. Probably because the time jumping has lessened. Most of my problems involve the lack of details/story compared to the novel. But really, 30 episodes are probably needed to do it justice. The fall of Nadine, Nick and Tom's relationship, Larry evolving all just seem like a blur. Even the old miniseries seemed to capture some of these aspects better.
I think it's casted reasonably well. Well, not Trashcan Man. Whoopi looks about 30 years too young. Lloyd and Nick seemed wrong initially, but they're OK. I don't like Ralph Brentner changing from a laid back farmer into an angry native american woman. Like Larry now being black (which works fine and doesn't affect anything), an obvious change for the PC crowd. Think that will stick out even more once they start the walk.