Xfile didn't allow me to purchase software because they had a requirement to use a non-Gmail address, but didn't make that clear in the purchase process and allowed the purchase to go through fine. When I complained, they called me "snooty" and said they were a community and "we don't want anyone like you".
I was shocked at this level of "customer service" and created a blog (xfileisbetterthanyou dot com) where I've posted all of our emails back and forth. If you find this insulting like me, please read the article and Digg it to send them a message that this kind of treatment is unacceptable.
Review about: Software Purchase.