I am extremely disappointed that soon after the guarantee had expired it stopped working without any warning. I no longer have my receipt so will have to bin it and throw all that money down the drain my colleague has had the same experience and what really bugs me is that it cost so much money and is I feel that I have been ripped off because the cheaper one that I have had to replace it with does not leak in the same way the Bullet use to and the result is the same.