>>28916645 They obviously don't do as good of a job of cleaning shit off your car (especially if it's built up). The main benefit is they also don't scratch your clear coat.
Decent for maintenance, bad for a deeper clean, just like a spinny brush car wash but with swirl your paint. Fully depends on the chemicals the wash uses since there's no useful mechanical cleaning
>>28916645 they're fine if you have some commuter car or shitbox you just want to knock the road grime off. if you have decent paint, a newish car, a classic or something similar then dont go through a car wash