It was installed in the toilet bowl 3 months ago and it has already started malfunctioning. The water doesn't stop running. The previous one was the same and broke after 6 months. I would describe it as a waste of money.

Very easy to install.
The height is adjusted by rotating it 90 degrees - be careful not to leave it open and have it jump up and scratch the closed position for N remember it.
It has an adapter for 1/2 and 3/4.
I bought 3 and 3 didn't hold up over time and luckily due to the quarantine we were at home, otherwise...