For fans of the original, this was quite good. Lots of fun to see Ian McShane back in the role he was (f***ing) born to play. The cast is still top notch, the dialogue still profane poetry.
I went back and watched the final episode of season 3 prior to watching the film. Just for the heck of it, to remind myself who was who -- but it turned out to be super helpful, as the film draws heavily from events in that episode.
Not like it is the greatest episode or anything, but a strong recommend to watch that episode prior to the film just to get back into the vibe.