[superbeefy]

I really hope square improves their reader. Practically every time I've used this system, as a customer, it seems to take a couple of tries before it actually recognizes the card. This may be okay for lower volume businesses, but for starbucks I could see this backing up lines.

[kpozin]

They also charge more if you have to key in the card manually (2.75% per scan vs 3.5% + 0.15 USD per manual entry).

[mh-]

this is because it's processed as a card-present vs card-not-present transaction. different fee (& risk) brackets.