You can only stow it up front on a few planes and only some of the time. It just doesn't fit on most DL overhead bins at least. Totally, radically, unacceptably unsat. To get one of the most basic metrics that wrong and focus almost exclusively on some esoteric concept like "the 737 jumpseat" was rediculous. Most of the time you're lucky, and I mean lucky, to find space wheels first/last anyway. Maybe, just maybe, you can turn it sideways and chock block some other poor sap out of his/her bag space. There is simply no reason for the dimensions to be what they are. Got R&D?
Huge, epic, flat spin fail.