Installation took 45 minutes to an hour. There are some things you can look at and get a general idea of how to install - it's really not one of them, but the instructions were good enough to fill in the blanks. You'll be doing yourself a huge favor by checking all installation work before you begin - it'll probably save you some time. If you have 3/8" fittings on the supply and faucet, you most likely don't need a second hose that comes with the kit - just connect the hose you disconnected from the supply (the hose that supplies water to the faucet). to the outlet of the filter housing. I should have stated it in the instructions. Attaching the filter housing to the mounting bracket (four screws on the top of the unit) is highly recommended in my experience, especially if you plan to mount the filter in a cupboard under the kitchen sink like I did. no noticeable drop in water pressure. The APEC brand reverse osmosis water filtration system comes highly recommended, which is why I chose their under counter filter. It's only been 2 days but so far so good. Installation was relatively easy but could have been a bit easier with more detailed instructions or perhaps a YouTube unboxing video. Small complaints, big ones.
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