Product review (4 stars): Almost perfect
The product arrived quickly and was well packaged.  According to the accompanying literature, it is a better filter than the original that came with my Kenmore refrigerator (but since I don't have a laboratory, I'll have to take their word for that.)  The only (slight) problem is that the replacement filter is just a fraction larger than the old filter and it had to be forced into the space in the back of the refrigerator.  This probably won't be a problem although getting it back out in six months might take a bit of prying...