I’ll be the odd man out here, I just returned my 12 PM and went back to my 11 PM, the rounded sides of the 11 PM to me are much more comfortable to hold than the 12 PM... design wise, the 12 PM is a more beautiful design, but the little extra width mixed with the flat sides were, to me, uncomfortable... so I’ll keep using my 11 PM until next year when the urge to upgrade will outweigh the comfort. Just my opinion.