Steven
It's not that hard to install. It either goes right under your sink or you can leave it on you counter, if you don't get the 5gal tank. You can either used to cutter, that comes with the unit, to pierce the cold water pipe or get an add-on connector, which screws into the pipe, so you don't have to make a hole in the cold water pipe. They also sell an attachment so you can connect it to the sink faucet.
If you don't get the one with the tank then you just take the hose, that comes out of the final sage, and run it into a bucket. If you get the 5 gal tank then you just let the system fill the tank up and either shut off the system when the tank is filled, most system will automaticlly shut off when the tank is filled, and drain the water and use it. When you want to use the water just turn the system on and it will fill the 5gal tank. I just leave the 5 gal tank filled and use it when I need it, which is not more than 3 or 4 days. It all depends on how much water you use for your tanks and personal use also.
Michael