Product review (1 stars): Way too expensive for how long it lasts, but ...
Update:
After 2 weeks the new filter crawled to a snails pace. Maybe my water is just that bad (unlikely). Maybe we use a lot of water (we do, but not nearly the rated value in 2 weeks). More likely these filters are a cheap quality, money grabbing, name brand shill of a product. Real shame because the water quality is quite good. I just cant imagine buying more than 2-3 a year. At this rate Ill need over 20!?!? Product is seriously defective.

Original review:
Way too expensive for how long it lasts, but does the job. Filters more contaminants than a pitcher every could. You'll know when you need to replace it because the water flow will drop quickly (over 2-3 days) and then become so unbearably slow you'll be forced to drink tap water or pony up the $50 for a replacement.