Though I do know that it puts some strong emphasis on mouse usage, something that for someone that grew to use the keyboard a lot like me (ironically, as a graphic designer) seems to be really awkward, to say the less. Its strengths seem to be its overlaying concepts and that it intended to be "the next gen Unix" - alas it won't take over for a myriad of reasons, and some would argue Unix-es have already borrowed some of its concepts for themselves.