Bests & Worsts Reviews from Amazon

We love this filter system because it was easy to install, it's invisible under the sink, and it filters the chlorine taste out of our water. We've bought new filters for it many times in the three years that we've had it. The one disappointing thing about it is that the flow rate falls off pretty quickly with time. We're in San Francisco, and our cold water before we installed the filter flowed at 1.6 gallons per minute (gpm). Immediately after installing a new filter the flow rate is 1.2 gpm, which is quite tolerable, but it falls down to 0.7 gpm over the following two months, at which point it levels off. The final flow rate is annoying enough that I finally measured our most recent one every week or two after installing it. A graph is attached. I'm not sure why the flow rate creeps up slightly after two months, but I took each measurement three times, and the variance between successive measurements was never more than 1%. In practice, we end up replacing ours about every 100 days.