I placed an order as a first-time customer and paid for next day delivery... conveniently, after the cut off for next day delivery, I receive an email saying my order was cancelled as my address was "unconfirmed".
I called and spoke with a gentleman who was all very "oh yeah yeah dats bcoz paypal said it Woz unconfirmed", which is not the case. This is my primary shipping address and the billing address is confirmed (I verified this with paypal by calling them).
It seems more likely that they couldn't fulfil the order for next day delivery and are making excuses. Very shady business practices, I wouldn't recommend nor would I recommend this company.