Hands free / Laser Washes are kind of hit or miss.
If its a relatively new or well maintained one, they do a great job, but if they are old and poorly maintained the heads get clogged and the coverage is terrible and you will end up with some spots on your car that are virtually untouched.
I would never use a brush based automated wash. I live out here in Texas where people drive rock and mud covered trucks through those, and you get to inherit all of the grime they washed off right into your paint coat.
I'm always extremely careful at the self services washes with the brushes and always thoroughly rinse out and clean the brush before using it.
Had a horror story happen one time when I was in a hurry to wash my car and didn't notice a bunch of gravel and stuff stuck in the brush before i washed my Mazda, poor poor mazda.