I've bought a few filters and at least 2 of them were defective. The last one had water dripping out of it when I opened it, and the webbing on top was ripped like someone used it and then packed it at the factory.  When it works, the water tastes great and it lasts almost 2 months. Now I'm out $14 for a filter and have to replace it again. Not sure if this is worth the expensive filters to stay with Zero.