I've used them over the years and they've been quite reasonable. Heck the engineering manager (in charge of manufacturing) came to our house on a weekend to fix a leak after a Thursday reinstall. The reinstall was a little pricey but I assumed they bundled in somethings they didn't need to do like drill through a counter top and tweak the plumbing. We've only needed to change the carbon and mechanical filter every other year. After some 14 years we finally needed to replace the reverse osmosis cartridge. Since the newer units were on sale at the time we managed to get one of those for about the same cost as a replacement cartridge. This is a local Bay Area company that manufactures here.