Matt was very polite, well groomed, and knowledgeable about my Lenox A/C. He even took the time to put a handle on the filter for easier access. He offered suggestion on preventing mold & milder by installing UV bulbs. Invoice and additional paperwork was e-mailed promptly after the tune-up. Company suggestions: He arrived 2 hrs early without a call ahead notice. My hubby & I were not home when he arrived as we had planned our day according to appt. time slot. That was somewhat unsettling as I had not cleared the a/c area for him yet or covered floors where he needed to access unit and flush with water. Secondly, Matt did not offer to wear booties inside our home . He needed to walk on our carpet to check vent in one room.