Called Performance Mechanical on Tuesday, 9/6/11, to give estimate/replace heat pump on one of my apartments. They arrived on the same day, gave estimate & had it faxed to me by 3 pm. The unit had to be ordered since it was replacing an old pump & had to be matched. It arrived on Friday & they had it installed the same day, finishing up the detail work on Monday, 9/12/11. Mr, Harris said it was supposed to be hot over the weekend, & they didn't want my tenants to be without AC. Great work & my tenants are delighted with the new (& more efficient) unit. I am delighted by the timely service & great work.