Not quite as good (IMO) as The Addams Family, but not a bad show. The Munsters was a bit more slap-stick than The Addams Family, but both were funny shows. Like the Addamses, the Munster family is unaware that they're any different from everyone around them. Even their "normal" niece, Marilyn, doesn't notice that they're different.
Fred Gwynne was perfect as Herman (mostly an overgrown kid). For many of us, Al Lewis will always be Grandpa and rightfully so. He brought great zest and glee to the role. Yvonne De Carlo was stunningly beautiful as Herman's wife Lily.
Another show worth catching if you can find it.