The product was easy to install and worked like a charm. I no longer hear the annoying sound of running water all day and my toilet has been working great ever since!

But the important feature to those of us who need to conserve water is the adjustable flush. It works simply

Noticed water leaking into bowl and tank occasionally refilling when not in use. Removed tank lid and checked to see if water was overfilling and draining into the overfill tube. It wasn't. So suspected flapper was leaking. Shut off water supply valve overnight to see to what point in the tank water would drain to. Water leveled off just below the flapper so that confirmed flapper was probably warped or worn. Replaced with this new flapper and no more water leaking from tank into bowl.

Toilet plug. Works well, but remember if you have hard water to change them every few years, because no matter how good a plug you buy they get crunchy eventually

Installed quickly and easily. Worked immediately. There's a sort of dial setting (more water / less water) that I really didn't mess with, but my intuition suggested that if you dial it more towards “less water”, it'll slam shut *before* the tank fully empties, and if you set it to “more”, the flapper will remain open a bit longer (allowing a stronger flush).