Installed in my old toilet tank, the mechanism has subsequently been adapted, nothing to touch. Installation is easy, even for the uninitiated, the only difficulties were due to the obsolescence of my tank and not the product itself. The cable control is very convenient, no height adjustment is to be performed for the push button. The double volume mechanism works well too, only small potential downside: when using the small volume of water pushbutton returns in a rather "virile" with a snap, we must see if over time there no risk of malfunction. For now I am 100% satisfied with the purchase and also the shipping speed, impeccable!