Product review (3 stars): Better deal than on manufacturer's site.  Does not last long
This is one of the more effective water filters I've used.  It states 300 gallon service capacity.  At least I've used them for over that amount without issue.

When you change filters, the flow acts funny for about the first half gallon - that's normal.  Some filters produce cloudy-looking water for the first gallon, but this one doesn't.  I've had no issues with these filters.

This is by far the simplest, most secure and easiest filter to install that I've experienced.  Also, I didn't find a better deal anywhere else including the manufacturer's site.  They try to sell these single by single, but sometimes in a pack of three.

It's just another filter to keep buying at its hefty price.  But its easy to install.