The Pur Water Filiteration system works great. It was easy to put together. You simply put in the filter that it comes with and then attach faucet adapter and easily clip the filter onto the faucet and you are good to go. Getting filtered water out of it is as simple as a flip of a switch literally. The Water Purifier even has a light indicator that shows you when your filter needs to be changed. It is not too heavy for our sink either. It even comes with extra parts just in case your faucet doesn't have the proper attachment. Also where I live we have well water and it helps us on having to buy so much bottled water because we essentially have purified water coming out of our sink. You can also taste the difference once you turn the purifier on compared to the regular tap water.