Product review (5 stars): Best Filter Available
This Filter is great!  It is a sealed unit that does not leak.  It comes ready to hook up,  as the filter element is already installed.  The flow rate is about a gallon per minute.  I have had mine about six months and it still works perfectly.  It makes the water taste much better because it removes the chlorine.  After about a year the manufacturer suggests replacing the unit - you just throw the whole thing out.  Because the housing is white (not clear) and because it uses KDF material as one filter stage it discourages the growth of algae and bacteria inside.  Also, there is no bad plastic taste or odor added to the water.  If you already have an aerator installed on your faucet, you can probably just unscrew it and install this instead.  Takes about 2 minutes.  It comes with its own aerator.  If you do not have an aerator already on your faucet you may need to purchase an aerator adapter, but this is very inexpensive and easy to install - it just screws in.  It has a  bypass valve that you flip to divert the tap water into the filter.  So for washing stuff you use water directly from the tap, and for drinking, ice cubes, cooking and pets you use the filtered water.  I have no way to test what this filter does other than by the taste of what comes out of it.  The water tastes very clean and fresh, without the pool water taste of chlorine.  And no, it makes no claims of filtering out the fluoride.  I tried other filters that claimed to address the fluoride issue, but each one either leaked or made the water taste worse than when it went in or just produced a trickle of water.  If you live in a city that adds chlorine to your water,  and if you have not tried any other filter yet,  give this one a chance.  Once you hook it up, all you have to do is run it for 5 or 10 minutes to help clean out any loose carbon particles in the filter element.  Then the water runs clear and clean and great tasting.  It is for use with cold water only, as hot water is not good for the filter.  The only thing that this filter lacks is a way to direct the water coming out directly from the tap in different directions:  it only goes down.  But many kitchen faucets have an auxiliary hand held sprayer so this is not a serious issue.  I liked this filter so much I bought some to give as gifts.  It is a well designed and manufactured product that really works.  Also, it is very compact and does not hog counter top space.