I'm moving from a 12" MB to a 15" MBP, and I have a hard time finding a comfortable screen setting -- and hence a comfortable working position. I thought it was the physical form factor (I posted a thread about that), but now I realize it's the screen. When I use the "more space" setting on the 12" MBP, I'm quite comfortable reading the screen. But the "more space" setting on the 15" MBP makes things just a little too small. I compared the screens side-by-side, and things are smaller on the 15" MBP. The two screens don't have the same PPI either. Of course, I could use the default setting on the 15", but then there is almost no gain in screen real estate compared to the 12" (1440x900 to 1680x1050). I wish there were a resolution in-between the default and "more space" on the 15". So, if anyone is considering moving from a 12" to 15" that is something to consider.