Yes, we have 2 rain barrels which are now once again full. It just rained!!!
I use the water for watering my plants. We have to pay for our water here so using the rain water really cuts down on our water bill. I've also used it for plants in the house. Plants, both outside and inside thrive on rain water.
You can use it for washing your hair as well.
This coming winter, I plan on bringing the barrels in the house and collecting snow, melting it and using it in the washing machine, again saving $$.