I had a hard time installing it to my sink at first. I eventually asked my husband for help and he was able to install it on the first try! Lol. I can taste the difference between the regular tap water and the taste after being filtered. I even did the freeze test. I froze a small amount of tap water and a small amount of filteres water and the filtered water froze clear. The tap water froze with a cloudy color. That is how I know it filteres well. I would recommend this product to my friends and family.