Eve - that is excellent advice and is exactly how a metronome should be used. (There are other uses of course)

I once saw Dave Shannon (Therapy) play "Grandfather's Clock" as a duet with a metronome. At the point where he stopped playing and pointed to the still clicking metronome as one would to introduce a fellow musician's break, it was hard to believe that this was in fact a mechanical device and not a living co-performer.

Cheers