I would be using my Mastercard yes - I hate personal checks, myself.
This was all Dan's idea, the texting, and my main necessity for it was I don't have a landline phone - I'm in a new apartment, I use my cell, and it's on a prepaid minutes plan. I don't want to waste even five minutes calling in an order, if there is an alternate 'free' method I can use.
That's why texting seemed good when he suggested it, and that's why an online cart or even emailing orders in sounded good when others suggested it - some of us are very busy, or there may be some other reason why a phone call can't be made conveniently.