overall this is a nice kit, includes everything you need for an easy install, and does a good job with producing clean water. if all you want is the stock faucet, then it's got everything you need. The multiple cartridges on top of the unit are all positioned from the factory with their writing upright, but since they all have the same flow directions when reading the labels, that also means there is a lot of excess, unnecessary piping looping around behind the cartridges. It's not necessary to have all the labels in upright orientation, and you can really clean up the system and remove extra piping by flipping one or more of the cartridges, so that the output of one and the input of the next are next to each other. less piping also helps to reduce friction and pressure drop in the system. Take the time to rearrange the cartridges into a more logical flow, and get rid of all the extra pipes, before you install it. If you are like me, or many other folks, you want more than JUST the stock faucet. You might want to connect this to your fridge ice maker, or as I did, to an under-sink hot water maker, and a Delta Glass Rinser. That requires a few extra pieces. The connection on top of the tank out of the box has both the feedline and the faucet line, which requires the tank to build up the pressure and depending on your city service pressure, the actual water flow during demand could be from the feedline OR the tank, or both simultaneously. If you want to build a manifold on top of the tank to serve multiple faucets and things, you will need to think about your install and make a few visits to your local Home Depot. it's not overly difficult to build a nice manifold to serve multiple things, and this system is very capable of handling several downstream things. I have no trouble feeding my glass rinser and an open-vent style hot water maker. Also, if you have a basement under your kitchen, you CAN install this system and hang it from the rafters under your kitchen, freeing up the cabinet space under your sink. You might need to pick up some extra tubing to fit the length you need, but that is pretty easy. You can also mount the filter system and the tank in different cabinets, say if your under-sink cabinet is too small to fit everything. Just try to keep the tubes as short as possible to fit your install needs. one thing I would definitely recommend tho... do not try to build the manifold directly on top of the tank. you will end up with an ugly mess that makes management difficult. Instead, spend a little extra to build a proper manifold system, with each inlet and outlet seperately valved, and attach it to the wall inside the cabinet. That will make maintenance significantly easier, and will allow you to isolate any part of the system without having to de-pressurize the whole thing. A proper manifold also allows you to expand to additional faucets easily without having to disassemble the whole system.