I've done several swaps on the board and have been please with all the blocks I've received. There are a few that are a tad off but that's okay because not everyone is perfect, I know I'm not.
I do shop at three LQS but have no problem buying from JoAnn's or Walmart if the fabric feels good and I can't see through it.
I look at each block that I receive as a gift from a cyber friend and appreciate the time and effort that they put into it.