The only reason for the four star rating is because I just installed it. I had originally purchased an "off brand" because it was cheaper. As soon as I opened the box I knew this was going to be a problem. All plastic. I installed it anyway. Faucet spray head leaked. Hot water slowed to a trickle because cartridge was clogged with debris even after flushing. Immediately took it out and returned it. Spent a little extra and bought the Moen. No regrets. I should have went with Moen to begin with. It would have been a lot less aggravating. Quality always wins out over cheap!