Bests & Worsts Reviews from Amazon

They work well AFTER you get an o-ring to seal them. After seeing the issue others have, water leaking AROUND the filter instead of going through it, and making very certain it was correctly seated, I put a thin rubber o-ring around the filter (most hardware stores carry these) which is reusable (I've had one o-ring for 7 filters so far). The o-ring makes seating it firmer as I push the filter in, and SEALS the filter so water must go through it. Get a thin one, it must fit between the filter and the wall of the insert area. I put the ring about 3/4" from the top of the filter, then push it in, and I can feel the o-ring "rolling" up the filter as I push and it seats the filter in very firm and tight. **See pics. This about a 2" o-ring, and they are cheap. Brita should use this idea and send a small o-ring with each 3 pack or pitcher. I think people who are complaining about the water quality don't realize the water is leaking around the filter and not being filtered. After the O-Ring, it takes MUCH longer for the water to go through the filter, so I know it's working.