I'm moving from the 12" MB to the 15" MBP, of course one reason being the bigger screen. I always had small laptops (with perhaps big external screens and external keyboard), and with the big laptop I found a new issue that I didn't think of when I bought it. If I put it in a natural position with the base edge at the front of the table, the screen is too far away to view comfortably in the "More space" configuration unless I hunch over. With the 12" MB I had no problems with the "more space" configuration in a natural position. The 15" MBP is more comfortable in default resolution. But if I use it in default configuration I get 1680 x 1050 vs 1440 by 900 for "more space" in the 12" MB. Essentially no gain for a huge disadvantage in size and weight. My solution is to put the 15" MBP so that the base sticks out over the front edge of the table. But that is not ideal either. How do you get a comfortable working position?