It was very simple to install, but I wish there was more information on the item listing about what/how it connects. I thought I was getting one that connects to a tap (I already have one that looks like the ones with other filters) but it goes to the main faucet. Not a big deal but a different project and source than I expected. I don't think it's changed the flow rate. I let the water run for a bit before using it, and for the first couple days it tasted sweet! My tastebuds have adjusted to the cleaner water now.