I have friends with one of those valves on their shower, and it’s really easy to use. One thing I wonder about is how it effects things down the line. They have a septic tank, but I’m also thinking of greywater systems for watering plants or whatever.
Could the concentration of soap in the water interphere with things?
I’m no font nerd, but it looks like they are trying to use a font like fraktur or another type of “germanic” blackletter font. Theme parks and such will use them to evoke a medieval look, while they are using it as an attempt at an “aryan” esthetic.