Product review (2 stars): They mailed the wrong filter, lower your expectations
They sent me a RFW1061 rather than the GSWF ordered. It fits and I ran the water for some 25 mins to be sure it was "ready." It does seem improved but not nearly as clean as with the expensive GE filter. It's true that there is less of chlorine taste, if that's an issue for you, and it produces a cleaner taste than city tap water. I do detect chemical aftertaste and that doesn't sit well with me at all.  These filters do not clean out microbes, as stated, and I think the taste reflects that fact.  I want to give this another star but that's not possible when I'm going to have to get the GE model now. I'm not comfortable using an incorrectly coded knock-off filter.  Returning it is far too much trouble.