Bought this and set the filter up, then discovered that it wouldn't fit under our tap! To clarify, we have a one-and-a-half bowl kitchen sink, so when the washing up bowl is full, the kettle won't fit into the half-bowl. If you have a normal, single-bowl sink, this is unlikely to be a problem for you.
I used it three times - filling it with a jug - before going to Argos and getting a smaller one!
Still available new from various outlets in the £25 - £33 price bracket, so a tenner is a bargain (and it will stop it cluttering up my worktop)