Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best Price for these.

I read a lot of people complaining about the lifespan of these filters. I will tell you, just like manufacturer's claims about battery life in Cell Phones, these thing do not last as long as the box says. HOWEVER: If you want filtered water, the cost per gallon (even when the filter only filters 30 gallons, as one review suggested, it is still exceptional. I normally get about 3 months out of each filter, about 60 gallons... we do have soft water here, so Well Water might shorten the life. If you need, or will only drink, filtered water, and you can buy 360 Gallons of clean water for $52, you should do it. Fact is, you get more. Given the choice of buying water at the store at 60-99 cents/gallon... and lugging it home, I prefer the faucet filter. Even if it did only filter 30 gallons, at the store that same amount of water would cost you $15-$30. The filters here are about $8.50 ea The Amazon price is less than half what I pay for replacement filters locally.