Wine of the Month Clubs

[Winnah]

I'm looking to get a gift membership to a wine of the month club for my parents. They are wine drinkers, but I,m really not. I've been looking and there are just so many to choose from, how can I know which ones are good and which ones are ripping me off by sending me crap wine. I would appreciate any suggestions of good international wine of the month clubs.
Thanks,
Scott