The people at Air Zero are very efficient. They called a little bit later than originally scheduled but they had called to see if it was okay (and it was). Air Zero kept me informed the whole way and provided excellent service. The technician was very informative and I didn't feel I was getting ripped off. I found out about Air Zero through the internet. I chose them because they had a bunch of good reviews. I would just say that Air Zero is an excellent company with good service and good value for money!