Pretty darn good job overall! The guy in charge was friendly and nice. He answered all my bombarded questions about pricing and time of waiting.
A waiting room where you can sit and watch them clean your car is definitely a relieving and enjoyable experience because you can make sure they do what they are supposed to do. I can definitely see them putting a lot of effort into cleaning everyone's cars.
So the only reason I gave them a 4 star instead of a full 5 is because when I checked my car out in the end, I still had these little yellow or white dot marks that could have been removed if they gently scraped it off. Instead, I used my own finger nail to do it.
But I'll definitely be coming back again!