replaced radiator

My radiator started leaking just before I had to go out of town for a week. Sam inspected it and told me I'd have to replace the radiator and perhaps the thermostat. He quoted me a price based upon a 3 hour labor factor (which was under $400). Subsequently, when I returned home, I found out that he had spent more time than estimated to complete the job. I asked if it would cost me more and he told me, "no, we don't treat people like that". He also didn't charge me for the thermostat because mine was working fine. I highly recommend him!!