Not bad at all...slight pain and no recovery time. You could donate bone marrow in the AM and play a good LAX game in the afternoon.
I looked up a health questionnaire for potential donors. There are many things that could have come up recently in her health situation that may have caused her to change her mind. There's a variety of potential disqualifiers, and perhaps she doesn't wish to share the information. While I think it's foolish, she may have her reasons.
I've determined that I am unable to be a donor.