i use pay anywhere, works pretty good, customers like it, because of the rewards they get from using the card. I only have 3 customers that use it, but it doesn't cost any money month to month and it was free initially too, so no point to get rid of it. Its 2% or 3% per transaction I can't remember. Not taking credit cards has never lost me any jobs, nor has it got me any new work, but if its convenient for my customers then i'll keep using it, it does save me one less trip to the bank. which probably makes up for the 2-3% transaction fee that gets taken out.
I just upgraded my 4s that i bought last december to an iphone 5 and haven't used it on that yet, but i'm sure it will work even faster with the 5!
fully lic. and ins. 10yrs exp.