Product review (3 stars): These filters do not filter disolved solids. You might as well buy the knockoffs.
Cannot say for sure if the filter I received is authentic or not, but what I can tell you is that there is virtually NO difference in the water when measuring with the TDS meter that I received when I bought my reverse osmosis system. Yes, I did flush the system. Here are the readings.
Tap Water: 256
Old filter 240 (over 5 years in use)
New filter: 249
Reverse Osmosis: 19

3 stars for High cost vs: benefits. These filters should sell for no more than 10 bucks.