I don't drink unfiltered water.  I used to buy bottled water.  Then I started using the Brita pitcher.  And now I use this!  I like this filtration system because it is surprisingly easy to connect (I thought it might be a hassle), the water tastes great, and it can easily be switched from filtered to non filtered.  I no longer need to keep refilling and waiting for my Brita pitcher.  Just turn on the faucet and it's as simple as that!