We have been very happy with the service from Advanced Homes - Central Vacuum Services. We haven't really had the need for their services too much because we have mostly hardwood flooring so there is not too much dust in our home. However, when we first got the unit they were very helpful, they were able to explain to us in great detail all the functions of the machine. They have also come out to clean out the unit and perform necessary maintenance. So far so good! I would highly recommend their services.