Product review (1 stars): Doesn't work well--at all!  Defective?
I purchased a 2-pack of the GE MWF filters.  I did receive what appear to be genuine GE MWF filters, however, neither have worked properly.  The first triggered the orange/red "replacement" light on my fridge within 5 days of installing it.  The filters are supposed to last around 6 months so I reset my light several times and it kept coming back on as long as that filter was in place (and it didn't with the bypass in).  I replaced that first filter with the second from the 2-pack, hoping the first was simply defective.  It's been a few days shy of a month and the water, which tasted great for about ten days started tasting terrible after that.
I made pasta with the water and it tasted like it'd been cooked in a swimming pool (chlorine).

I also use two Pur brand water containers and even when the filters are approaching the end of their life, I cannot taste chlorine in the Pur water (even if I can smell it coming out of the tap!).

I'm not sure what is up with these filters but I can't imagine there isn't something wrong with them.  GE says it must be my fridge or the light, which I doubt as it's less than two years old and prior to this was hooked up to an R/O system and at that point my fridge was not contaminating the water!  At over $30 each I certainly do not want to keep changing these out every 10-20 days.  I've considered buying more but I think I'll pay the little bit extra and get them straight from GE or a hardware store next time.