Paula (the owner) has been a real patient gem and very flexible as well. It took me a while to get the hang of milking and DD was not much faster, though I know now she has an advantage due to her smaller finger size (;-}). But Paula stuck through it with both of us, as long as we needed to. We also appreciate the flexibility of the co-op: when we were sick we were able to cancel on short notice without much ado about it. Overall this has been a real pleasurable experience.
Regarding the price, it is probably comparable to the farmer's market price, but I have not done in-depth comparisons. I feel I get so much more here, not the least: the milk is really unprocessed and raw, which to us is priceless, so it the personal connection with the goats.