Yes, I use it for craft shows. I have used it with an android and now my IPhone. It's great, but they do take a bite of the money, just like Paypal. You have a certain amount you can collect for free when you sign up, but after that amount is reached they start deducting for their percentage, something like 3%?
As I said, I only use it for craft shows, but if I wasn't able to allow people to pay with their credit cards, I'd lose a lot of sales! Seems nobody carries cash anymore.