We found that the selection process for RO units is a minefield. Most impartial reviews identify the same units/companies that appear to match a fairly well defined set of consumer/buyer criteria. The US Water unit is not evaluated? The criteria include acceptable quality, function well, easy to install, and are reasonably priced. The technical data for the systems rarely address where the unit is made only where it may have been assembled (In the US usually of Chinese or Taiwanese parts), little or no information about use of proprietary filters, and the guarantee is usually 1 year although some say 3 years. So you read through the significant complaints or weak points for these units and comments include: leaky filter assemblies due to cracks, broken plastic valves or fittings, or they waste too much water. You will read in some of the reviews that the units should provide good service for 2-3 years when you can then buy another unit... really?
Ok so we purchased US Water because it has a history of great reviews. Dealing with the representative was easy and straightforward. He answered all my questions and then some. This unit did not appear to be sold on Amazon although some other retail outlets may handle some of their products. The source of the great reviews are that they have an all US manufactured unit albeit with quality fittings from a UK manufacturer based in the US. We wanted to spend the money at home not in China and have that reflected in quality and years of service. Also we wanted a system that could receive industry standard filters and components. So we will see how the shipping and installation go forward and will review the unit operation when operable. Like many purchasers we only have the information that is available on line and depend on company integrity, customer reviews and impartial commercial ratings to make a sound decision. If there is any wrong or misinformation in the decision chain then our choice may not be the best one.