My experience has been great. I have been a customer for 5 years now and have found the service to be prompt and reliable. The installation was without any difficulties and all the codes etc. were taken care of by Generator Power Systems (Fish electric) which really made my life easier. The technicians are knowledgeable and very patient when explaining the care and maintenance of the system. I do use the maintenance agreement and have really appreciated having it. The system has always functioned reliably and is a godsend in this Houston weather. I can't imagine being without my system and I would advise everyone to become a customer.