Customer reviews of Scalewatcher on Amazon.com are generally favorable, but some reviews say the product does not work. Some concerns have also arisen as to the legitimacy of reviews. With that said, most reviewers stated that Scalewatcher fixed their hard water.
A few reviews advised patience, as the process can took a few weeks. Scalewatcher closely monitors customer reviews and has offered to help a few customers with either a return or help setting up the system correctly. One reviewer posted a lengthy email exchange with an authorized dealer detailing his struggles and eventual success in getting the unit to work. One five-star review was posted by the CEO of an authorized Scalewatcher dealer, raising concerns of a conflict of interest.