The  under counter water filter easily mounted under our sink with a few screws. The unit came with a faucet that we put in place of the dish sprayer in our sink. Set up wasn’t more than 30 minutes or so.  It takes a few minutes running to clear the system of it’s “newness” and in a minute or so we were getting great tasting water.  We chose the Aquasana AQ-4501 as it came with a nice brushed stainless faucet that matched our sink perfectly. The company we got ours through even sends us email reminders to replace the cartridges, which makes it a lot easier than trying to remember ourselves.