I just wanted to write and let you know how much I appreciate you and the great tech support. I have had to call a couple of times to get info and have never been disappointed. Rob Glendenin has helped me a couple times, always friendly and helpful. I'm pretty technical minded and can do many things myself, many companies disregard this, and put me off with some reason or other; not Rob, he is keen to listen and get all the info needed to help me diagnose an issue and freely shares his info so I can get the best result with my spa. I have recommended QCA to so many people. Please let Rob know how he is appreciated and that how he communicates says a lot about how you yourself operate your company. Thanks for creating an environment where your employees feel empowered to step up and help us customers. I wish you many successes sir.  larry jackson, Lockhart, Texas