Perhaps, but some (at least 2) will have stopped using it and gone to Messenger Pro instead.
A well written and well structured manual would have prevented that.
In reply to riscdomain:
Well, it comes with a manual in the form of a number of emails within the program but I wouldn't call it well structured and some people prefer a paper manual.
Both my sister and myself would have paid extra for a paper manual had it been available. (I still might now).