I *strongly* recommend the soft cases made for the 13" sony vaio laptops. The M1210 is hefty for a 12" laptop, and I found that the 12" sleeves just weren't large enough (I went through two of them, including the Dr. Mo). The Sony case is a little softer, but it fits well with the 9" battery, is easy to put on/takeoff, and comes with a matching case for your power adapter. Someone else (on this forum I believe) made the same recommendation long ago but I think it got lost in the hype over 12" cases.