Overall, my situation is very different than a "new" house with no existing under-cabinet water filter. The house we live in now was upgraded with our undercounter water Amway filter which today is over 20 years old and everyone in the house was sick of the poor filtering quality. Since Amway stopped selling replacement filters I could only find after-market filters which were not the same quality plus I suspected all the crud on the water spigot and I'm sure the lines were also not so clean any more. So, after enough online analysis and "consumer reporting" (who did not impress me with their recommendation) my wife and I decided on the Frizzlife water filter. Several changes were going to happen because my wife was concerned with the dishwasher in the cabinet adjacent to the sink in that it heated the sink cabinet. This was a problem as she continually noticed "warm" water from the existing filtered water spigot. The heat affected the Amway filter and all the tubing under the sink. In addition, I had run a line from the sink cabinet down to the basement to feed the ice maker. All of which was done with 3/8" tubing instead of the standard 1/4" tubing. So, as I said, my situation is not the "new" house situation and took more work than most would dare to sign up for.So, our installation required the filter to be placed in the basement, far away from the dishwasher's heat. This is why you see it mounted in the basement where it will stay cool. The blue line represents my cold water feed from under the sink and the white line ( I purchased the ice maker kit which is white tubing - I tend to sometimes over design ) is the filtered line. I split the filtered line coming out of the filter with a T-connector then placed a separate shutoff for the ice maker (in case I need to 1) adjust the pressure going to the ice maker and 2) I need to move the fridge but I don't want to shut off the filtered water all together - again, my insane over design mind at work again ). I also had to change the fitting on the 1/2" copper to a Sharkbite 1/4-turn 3/8" compression as the existing fitting was a dual 3/8" with the 1/2" sweat copper fitting. With the Frizzlife 3/8-3/8 thru with a T-1/4" shutoff adapter which screwed right onto the Sharkbite 3/8" compression threads I had no problem. All of the tubing snapped into the fittings clean and without trouble. I made sure EVERY tube was cut at 90 deg to ensure the tube would seal when inserted into the fitting. As for the faucet, my old faucet was disgusting! I crawled under the sink, as someone else said, doing a contortionist maneuver - not once, but several times. Removing the old faucet required my daughter's help to turn the faucet while I held the nut from underneath, all the while pieces of dried plumbing putty falling on my head, face, nose, mouth (yuck!) and my daughter screeching how disgusting it looked from her above-sink vantage point. Then, installing the new Frizzlife faucet took the about the same effort except tightening from underneath instead of from above - this took me much more effort with a sink-wrench. Overall, the work involved is typical of a sink faucet installation and the extra work in the basement is far above expectations for most, but again, my situation was very unique and my wife had very specific requirements going into this project.The Results: My wife noticed the lower water pressure at the faucet, which I had warned her would happen since I was changing from 3/8" tubing to 1/4" tubing but she LOVES the clarity and taste of the water. My favorite result is that following the guidelines and instructions I had ZERO (0), yes, you read that right, zero water leaks when I restored the water! I was somewhat concerned about leaks because of other reviews but then I realized they may have not made clean, 90 deg cuts. Plus, I've done enough plumbing work to know that taking the time to make the correct cuts, properly cleaning surfaces (like the 1/2" copper before inserting the sharkbite) and double-checking all insertions is extremely valuable. Keep in mind I too have a history of making huge messes with water leaks. I have had a history of the ice maker line leaking at the most inconvenient time (a la Christmas morning while we were at Grammy and Pappy's house and the basement started filling with water while opening presents). Lastly, the process to change the water filter at regular intervals was a MAJOR concern/requirement on my list as I have had to change the old water filter every 12 months for over 20 years and I was SICK of cleaning out the sink cabinet and then going through the exercise of turning off the filter water, opening the filter (creating a minor, wet mess) and cleaning out the filter housing, then installing the new filter and then running the water for 5-10 minutes to clear the filter of carbon particles after which I reloaded all the cabinet items. Now, I have all the room I need in the basement to work with this filter AND I do not need to worry about any "minor" water messes as it auto-shuts off when replacing the filter. The bonus is I was able to hang the plastic wrench on the same mounting board as I mounted the filter. For some odd reason I actually look forward to replacing the Frizzlife filter!Overall, all the items are solid quality and if anything, Frizzlife goes above and beyond. From the complete set of instructions to the attention to detail with parts and how the parts are purposely packaged, everything they shipped was in great condition and worked like a champ. I even sent in my 150% warranty information and they responded via email on a Sunday!