I started with CMK as a Groupon sort of special several years back and stuck with them because of the great service. Chris takes a personal interest in my pool. Early in the summer when a series of storms turned my pool green, Chris came out personally to supervise getting it back in line. When he said we had a buildup of insoluble solids (minerals... it happens with our hard water) we got confirmation from Leslie's, then followed Chris's advice to do it ourselves. We could have paid CMK to do it, but he saved us money by walking me through it. His service people are prompt and thorough. The price is very competitive. What else can I say... they are terrific.