We have very hard water in the so cal desert and this shower filter offered a simple solution getting softer water while washing. Since we're on a septic system I was told a total home water softening system could cause problems.  This leaves my skin and hair feeling much better after washing.  The extra bonus is the long hose length which now makes washing dogs in the tub easier too.  We signed up for the auto replacement on filters so I look forward to being reminded when it's time to replace the filter.