It is interesting.
I guess it would be beneficial if you lived close to the city and had a group which you could all go in for. I think that sometimes the effort to go to a place like this outweighs the savings you can potentially make. For us we would have to take into account the travel time, fuel and parking costs compared to the savings. In many instances I have found that what boasts to be wholesale prices (I have been to Cambells Cash and Carry for items for our youth group) really isn't saving that much. The membership on top of it is another thing!
I could be good tho