I do like the filter holder because it is what I looked far and wide for. I find that it does not fit some of the larger mouth coffee cups, like the 4" diameter tops, as the holder barely fits over the cup. The one problem that I find to be a nuisance is that the bottom of the filter holder is concave. If it was flat on the very bottom it would fit nicely over my coffee cups without tilting a bit. Or if the bottom of the filter holder had a defined lip on it that would work better as long as the inner dimension was known.