Lost was okay for me, but BSG just didn't make any sense imho - it bothered me for a number of smaller reasons and bigger continuity problems. Lost, however, had a fine wrap-up as far as I was concerned. It's a subjective thing, opinion, because all shows have problems, but whether they bother you or not depends on many factors.
It's funny how people keep blaming J.J. Abrams for the problems in Lost when all he did was write the first episode.
It's funny how people keep blaming J.J. Abrams for the problems in Lost when all he did was write the first episode.