This is the shower head we use on our boat. Yes, that’s right; it’s a kitchen sink dish sprayer! We’ve been using it for years now without a problem.
What I like about it is that it forces the shower taker to take a “Navy” shower. You cannot leave the water running without depressing the handle. It is also an instant on and off. No messing with a dial or lever to turn. It has more pressure to the spray than your average shower head and probably uses less water. The gals on our boat say that it does a great job for rinsing the shampoo out of their hair.
It’s easy to install, costs a lot less than most shower heads, and can be bought just about anywhere. I don’t recall where I got the holder for it, but that too is probably available a lot of places.