it went amazingly! Mark could not have been more informative and professional. I knew nothing about my system. Mark made me feel like family and very comfortable. I explain from beginning to end how everything works and what I need to do to maintain my water quality. Water is the most important thing coming into your house. I was very impressed and I learned so much. I will be using this company for many years to come I trust them with my water, I trust him with my life. Thank you Mark!