Lorenzo was a very nice man. Respectful of our home and easy to talk to about the issues we were having with our system. Very willing to explain things. I'd be happy to have him back anytime. Note - the coupon for $150 off a diagnostic is for the first 30 minutes. It was an additional $125 for the second 30 minutes. I'm a new home owner so I did some price comparisons and that seems about par for our area. Actually a little bit cheaper than some. I'll def have them back next time we need help with our HVAC.