Everything is fine. Comfortable. Entrance, exit. A waiting area. The exchange machine. A sufficient number of boxes. There is nothing to add for a self-service car wash.
The sink is not bad, but there are disadvantages.:
1) As soon as the temperature is about 0 degrees, the handwashers are closed and there is no place to wash a rag.
2) Due to the fact that the sink is in an open area, and when the wind blows, all the foam from neighboring cars flies to your clean one and you need to wipe it quickly and leave
I always wash my car at a contactless car wash. This one, in my opinion, is the best. One of the things that pleasantly surprised me was a gun with an antimoshka liquid, which is very important now. In addition to "washing the car", you can drink coffee from the vending machine (quite, by the way, for cheap), buy related products. I recommend ☺️