After 1 year of use, it appears to be more "hard" in the use of the rubinets, and they do not open and close as easily as in the beginning. At some point, the right cold water started working "tightly" and required force to turn it, eventually it stopped working and turned without resistance, so I assumed that it was internally damaged and ordered another battery, but as I later found out, the hidden screw that holds the rubinet had come loose. I removed the small plastic cover with a small screwdriver, tightened it, and the problem was solved.
For its price, one could say it's OK, but if it doesn't last long and needs replacement... then considering the additional cost, it may not be such a good choice.