I am soliciting opinions from those of you who have used both the 13 and 15 inch MBPs. I am aware of the specs and the pros and cons of each model, and in this thread am only interested in the size of the two models. I don't have the opportunity to test these things myself, so please respond with actual anecdotes and not guesses or hypotheticals . 1) Can the 15 inch model be easily balanced on chest/stomach while laying on a couch? 2) Does the 15 inch model become a pain to lug to work every day? 3) For games (i.e. those which both models are capable of running) and movies, does the extra screen space make it worth the extra weight on the 15 vs. the 13? Again, I am looking for anecdotes and not arguments about the merits of each size "in theory" - I know some of us could go on and on about that! Thanks for your time.