We switched our Carrier Infinity maintenance contract to HSi a couple of years ago, and we’re so glad we did. We’ve never been disappointed with their service and their work. Everyone in the office who we’ve talked with (John, Carlos and Tim) have been friendly and helpful, and both field technicians who’ve come to our home (James and Brandon) have been professional and personable, and have done excellent work. We’re Hightower customers from now on!