Product review (2 stars): Don't waste (half) your money
EDIT: These filters come in a two pack so my initial experience and review was with the first one out of the package (see below). Out of curiosity I installed the second one and it has performed better, at least initially. I'm sending them back anyway due to the poor performance of the first one but now I understand why there are so many positive reviews. The product is obviously inconsistent but I'll bump up my review one star based on the performance of the second filter.
INITIAL REVIEW: Absolute garbage. I've had several varieties of filters that are "UKF8001" size and supposed quality but these are the worst of the bunch. Water NEVER flowed well, even from the beginning, and after putting the first one in its now a trickle of water only after a week! DO NOT BUY THIS GARBAGE FILTER! I will be contacting Amazon about the horrible quality of these filters.