Just watched the last episode, I think it was a great series all in all. Episodes 6 and 8 were the standouts, but it was never less than good across the whole run, Ness is a fantastic writer and I think it was rather well cast as well, most of the characters managing to avoid becoming stereotypes (something Ness has always been good at).
As for the finale...
Considering that I had absolutely no expectations going in at the start of the series, I was thoroughly entertained throughout.