I had high hopes for the filter and it has met or exceeded all of my expectations.  We are in Los Angeles water and the two TDS meters I have both read around 320 PPM.  With that, I expected maybe 30 gallons out of a filter, but surprisingly we managed to get about 54 gallons.  Although I could not find definitive information about whether or not it also filters Fluoride when you're getting literally zero PPM it's a good bet that it does.