We have been dealing with this company ever since we gave them the contract to change both the A/C unit and furnace. We had been impressed at the time with their sales person (Paul S. - an engineer by trade) so we decided to also deal with them for the maintenance of both units. Ather H. is our technician. We always ask for him because I know I won't get duped. He is thorough and methodical. Although it is done on a regular basis, our A/C unit tends to get clogged because of its location. Whatever product he's applying to unclogged it works great and it makes me feel better knowing that the unit will be in top shape again for this summer. Of course other checks were also performed: level and pressure of refrigerant, hose check, electrical circuit etc... So again, very satisfy with the service. See you next year Mr. Hasan!