Using this in my garden office, it was perfect for the first month, but then, like other reviewers, it suddenly decided to reduce the amount of water it wanted to produce to about 1/2 of what it was, so I now have to press twice to fill my mug.  The variable size selector still works, but now only from tiny to little, instead of from little to large (output-wise).  There is obviously a design flaw with this model.  Would recommend if this issue was resolved.