We had this lovely faucet installed when we remodeled our kitchen about 5 years ago. We love the look and feel of the faucet, however, after 4 years of heavy use, the faucet started dripping & it was almost impossible to find the "sweet spot" to turn it off. I called Delta, and they sent me a new cartridge- easily installed. Worked like a charm. Now, about a year later, the handle started making a grinding sound when turned off. Called Delta again. They sent me a new handle with all necessary parts for replacement. It was very easy to replace. Once again, everything is working well. I have rated 4 stars due to these issues. As for Delta's customer service, I rate them 5++! They have always been helpful, friendly, and want to make sure all works well. I would definitely purchase this faucet again. We have several Delta bathroom faucets, more than 30 years old, that are still working well. A great company, great products & (I was told) are still made in the USA!