I've been a monthly unlimited user for a few months now. In that span I'm guessing I've probably received about 20-25 washes. Way more than the average person should get, but just the right amount for us 'Clean Freaks'. I consistently frequent the 44th St and McDowell location, as it is close to home, and the service professionals at this location are wonderful.
A basic wash will run you a measly $5, or you could upgrade to the unlimited starting at $16 month. This makes total sense to upgrade if you're getting your car washed every weekend, or more. Plus, you get to fly through the Fast Pass lane and point and laugh at all the schmucks waiting in line.
Keep some shammys in your trunk to dry off your car in one of the many covered parking spots. Complimentary vacuums are provided at each parking spot as well. Clutch!
Tip: Don't be the person to blare your music while vacuuming out your car. No one wants to hear your poor taste in music.