Out of three options, I went with Austin Water Solutions simply because these guys were genuine, and they installed the system the very next day. The following week after the install another rep came out to inspect the installation and to offer additional support (questions and concerns) about the system. I definitely recommend Austin water solutions. I was referred by someone and then quickly referred someone myself, and all three of us are very happy with the system, the support and the soap products they give as a bonus.
