I received the shower filter it was delivered on a Sunday which is awesome! The shower filter comes with three extra shower filters and they last for about 1 to 3 or 3 to 6 months depending on how bad the water quality is. I looked at the directions and it was very easy to follow along with the pictures. I'm excited to use this. I'm excited to use this product because our water is very hard water and the less minerals and sentiments and impurities there are in my water, the better it is for my family.