Aside from the obvious size difference, the main difference (repairability not being a real difference) is whether or not you need a PC card slot. The 12" PB, like the iBooks, incredibly does not have one. For many road warriors who must get online just about everywhere, wireless PC cards are a necessity and the lack of a PC card slot is a deal killer. On Apr 11, 2005, at 10:41 PM, Wilson Ng wrote: > I have a 12". All the stuff is just cram-packed into a smaller casing. > That's about the biggest difference between the 15" and the 12".