Product review (2 stars): Performance drops sharply after a short time.  Disappointing.
This filter unfortunately does not seem to perform as advertised.  While there is a lot to like about it, it only offers trade-offs over current filters on the market.  Ultimately it's more of a hassle over traditional filters.

Setup and activation of the filter is a process.  There are a number of components that need to be washed and assembled.  The filter needs to be soaked for some time, and due to the fact that the filter tends to float, I spent the time to hold it under the water to ensure a complete activation.  It never actually stayed submerged during this process.  The final step is shaking the filter.

Once assembled, it performed nicely for a few days.  I could leave the pitcher in the sink to fill up under a moderate stream and it would only take a minute or so.  The performance quickly dropped, however.  Now it takes a few minutes to fill up under only a trickle.  Any faster and the reservoir on top overflows and leaks into the filtered water.  It seems like a step backward.

The other filters on the market that have a more thorough filter and a larger reservoir actually perform better.  You can fill up your water bottle from the pitcher, then fill up the pitcher reservoir walk away.  With this, you have to stand there waiting for it to fill.  It's a step backward.  And the fact that the filter on this product is only a fraction of the filtering capability of others doesn't really help.

I was puzzled that the throughput of the filter fell off so steeply after such a short time.  They are supposed to last 3 months, but I only got a week or so before the throughput dropped.  I thought maybe the filter had frozen so I left it out of the fridge for a while.  That didn't help.  I guess the water could be so loaded with particulates that it clogged up the filter really quickly, but that seems unlikely.

There are some other gimmicks to this product like being able to easily remove the filter to fill up a pot of water or a water bottle, but it performs so poorly that simply filling from the pitcher is the most efficient.

I do like the look of the pitcher and it is easy to hold and use.  Unfortunately, the performance is just so bad that I can't really recommend this product.