we are still using the original filter and we're using it daily, most days 2 times because i filter my coffee and teas water now, the taste is so notable I can't say enough about this product, nearly 2 months strong and tasting so refreshing.
Just make sure to follow the directions as it does require you to soak the filter before use, initially I found it annoying to do so but WOW, I consider it a necessary annoyance (kinda like replacing a roll of paper on a holder annoyance) lol, it really isn't that big an issue and if it gives me such tasty water well I have no issue with that.
If you're considering purchase I would encourage you to try it the company is fantastic as well very attentive and helpful,
christina