Product review (4 stars): Hey Culligan Man
I have installed two of the Culligan under sink water filters, one in my home and one in my son's home.  I would recommened buying just the filter and attachment and a watts faucet vs. the kit though.  The kit has plastic parts and if you go to Menards or Home Depot you can get Watts standard fittings and connectors to do it yourself that are not plastic, they will also carry the plastic water line as well.

It is easy to install and the water tastes great.

On another note:  The second filter and attachment I purchase leaked but Amazson made it easy to get a replacement and the second one was there in a couple of days.  They are easy to work with on returns.  Good customer service.

My son likes his filter system as well.