Here is something, which IMHO is way better:
http://www.calcarcover.com/product.aspx?id=318&s=on
Advantages:
1. Start the flow of water one handed
2. Full rubber tip...no scratches
3. Small...gets into tight places
4. 100% leak proof. I have left the water on for over a week and zero leaks
5. Can control the volume of water easily
Being small this nozzle can easily get inside my alloy wheels and inside the engine compartment.
These "fancy" nozzles give great spray patterns, but what good is a spray pattern if you can't get the water where you need it?
http://www.calcarcover.com/product.aspx?id=318&s=on
Advantages:
1. Start the flow of water one handed
2. Full rubber tip...no scratches
3. Small...gets into tight places
4. 100% leak proof. I have left the water on for over a week and zero leaks
5. Can control the volume of water easily
Being small this nozzle can easily get inside my alloy wheels and inside the engine compartment.

These "fancy" nozzles give great spray patterns, but what good is a spray pattern if you can't get the water where you need it?