Hey everyone. I have been seeing the Square Up mobile credit card reader for iPhone more and more and I was wondering if anyone uses it? I have one friend who has it and used it once, it worked but he hasn't used it since so I need more feedback before I get it. They charge 2.75% per card swipe which is pretty low compared to others i.e. $35x2.75%=.96 which isn't bad for having it sent right into your back account plus the reader is free. Basically I'm looking to see if anyone uses this or if they use anything else for on the go credit card readers. Thanks in advance.