Bought a piece of music from Blackwell's which had a long delivery time-- over two weeks. They sent me the wrong item. I requested that they send the right item to me. It took them 4 days to get back to me. They said the item was out of stock. It clearly wasn't -- I directed them to their own website to show them where the item was where it was incorrectly listed. They corrected their mistaken listing but never sent me the item. Instead they issued me a refund. This whole "customer service" interaction took over a week. Totally unhelpful and slow. Will not buying from them again.