Most of my orders have been shipped without problem and/or difficulties. The single most annoying thing I have experienced, however, is when a book is shown as available for purchase and shipment, and when I order it, I recieve an email a couple of hours later saying that book is'nt available anymore. This has happened twice with the same book. I've probably experienced this 5 times during the 4 months of orders I have placed and it's just so annoying.