говорят не работает этот Square %)

http://www.businessinsider.com/the-truth-about-square-merchants-say-the-dongle-doesnt-work-2012-1#

Everyone we talked to seemed to agree that Square saves money and time, but the credit card reader dongles are of poor quality.

We also heard that you need a pretty decent internet connection to use Square so the app doesn't get bogged down. Even though conventional credit readers use an old 56K phone connection, they might be more reliable because they're not wireless.