I'm unable to use my water at home (hard, minerals, etc). Because it DESTROYS car paint. Seriously wrecks it. So, I did the unlimited (1x/day) plan. For 2017, I ran the report. 113 car washes. Mostly auto, but I also do hand bay, where I hand wash it. for $26.95/month, this works out to.... $0.349/wash. not bad! Now to hit it w/a Clay bar and wax next weekend.