I had Culligan for years, and last January I canceled my service only because a plumber talked me into cancelling my service and go with a newer model that only required a filter change once a a year. What a mistake that as because the plumber turned out to be scammer who took my deposit, kept canceling appointments and finally disappeared. Learned a valuable never pay full price for a product until you get the actual product. I became a customer again because several months of hardwater showed me what hardwater does to your skin, dishes etc. The person who delivers my unit every month is a very nice and pleasant.