A comment
I live in a women's dormitory, where there is a shared kitchen. It is clear that no one wants to spend money on public needs. We decided to collect two hundred rubles and bought a Chinese inexpensive mixer Haiba HB 4113 - a little more than one thousand rubles.
The mixer is very convenient, easy to clean - just swipe the surface with a soft cloth and again, like from a store. It is very easy to regulate water. A few people use the mixer, and no repairs were required. From this I conclude that the products are reliable.
It is possible that the plumber did not install the mixer correctly, but the faucet is swinging very much and sometimes it seems that it will break off. The filtration grid immediately began to fall out of the nose, with a more powerful pressure of water. I had to wrap it with threads, soaked it in an adhesive solution, and for two years we have not remembered this inconvenience.
pros
Inexpensive, high-quality coverage.
Minuses
The faucet does not fit snugly into the mixer body.