I have used Square for over a year now and I’m pleased with the operation. They handle all cards with a per transaction fee of 2.75%. NACHI has a deal with ePNMobile through Signature Card Services with a lower rate on Visa and MC. I don’t recall the rate. I have signed up with them, but it’s a more complicated company to deal with and I have not used them up to this point. Plus, there customer service is on the west coast and so far, I have not been able to log into my account. Square was super simple to set up.
With Square, and maybe ePNMobile, I get a secure web site where the customer can simply purchase an inspection online for the same per transaction fee. This comes in handy with out of state customers and it keeps me out of the loop of taking CC info over the phone.