We just loved it and resubscibed for this winter. There are just two of us, but unlike a summer share, most of the vegetables are suitable for cold storage, so nothing goes to waste if you don't eat it up immediately. We eat A LOT of vegetables, but I think a share would easily feed a family of four more normal vegetable eaters.
It is important to have space to correctly store the produce - we have section of our basement that has a dirt floor and it stays quite cold - we also have a second fridge in the basement. As other reviewers have indicated, it is important to check the stored veggies often to use up any that maybe heading south. We did lose a couple of squash to mold as the weather warmed up but otherwise nothing went to waste.
I also took part in the experimental Preservation Share, which I really hope Gretta will offer again - I have a freezer ful of pesto, pints of pickles and quarts of tomatoes from my share.
All in all Belmont CSA rocks!!