Product review (2 stars): You get what you pay for
Got the filter in today, it is labeled as rated for 300 gallons, as opposed to the 750 gallons of the name brand.  While it is half the price, it lasts less than half as long.  Also, when I put it in, granted you have to drain the first gallon or so of water, but this one spit out pure black, with debris in it. It took about 3 or more gallons to get it clear, and I drained another 2 gallons to be on the safe side.  I noticed the water flow is better with this filter, but given what I have seen so far I would say it is because it is probably because it isn't doing much in the way of filtering.  You get what you pay for I guess.