Took me 2 days just to uninstall the old one. Those cabinets are just too damn small for a human body to work in, especially under the sink. It had been in there for 25 years and nothing seemed to loosen the nuts. Ended up having to hacksaw off one with a small hacksaw so as not to damage the sink. Was sweating bullets when I finally removed all the components. Figured the installation of the new one would be a snap, after all the instructions said 12 minutes. BS. I still had to contort my body into the small work space. When I finally finished, turned on the water and everything seemed to be fine, until later I noticed a small drip under the sink coming from the inlet of the hot water side. It was all I could take at the time, so shut off the hot water and left it for some time later. Like next week or so:) I've done plenty of plumbing in my life time, but just getting too old for this crap. Not sure I'll ever trust this install not to leak sometime in the future. One of the reasons we always shut off the water when we leave for any length of time.