Problems?
I guess mostly that my friends can type faster than I can... The conversation window is really small and you lose track of what you are talking about. As far as the program, it works well. I'm never in it enough to say whether its buggy or not, but for casual use it works well. It looks and acts just like ICQ for windows so there really isn't any learning curve.
I guess I'm just not much of a hunt and peck typer...