Quick install, saves water, reliable, but a tight fit for smaller tanks. CORRECTION: I misspoke about the green mini-valve that controls the bowl re-fill level at 3:45: down is fully OPEN and up is fully CLOSED. I had it reversed in my explanation. Sorry for the error! Read my full review here: https://goo.gl/QBxHCx Amazon Affiliate Product Link: http://geni.us/bvAIQ