I have the earlier generation Muji Bellow without the wheel lock and like it quite a bit. My preference for suitcase split is to have a deeper compartment rather than clamshell 50/50 or 60/40 split. I don't think mine has a strap on the bottom to help pull it out in the wheels out position which is a slight disadvantage.

Capacity is a bit smaller than my two wheeled 22x14x9 Eagle Creek Load Warrior. I take the Muji to Japan and other parts of Asia where there is plenty of paved hard road and escalators. Sometimes it goes on international budget airlines as it meets some size requirements a bit better. The two wheeler goes to places with cobblestones, stairs, carpeting, hills, or needing a bit of extra storage.

Measurements:
Weight Lb 5.3 lbs
Weight Kg 2.4 kg
Size metric: 53 x 35 x 20 cm
L+W+H metric 108

The new one's depth seems to be a bit wider according to spec and should fit American legacy sizers if they are like UA's http://www.flyertalk.com/forum/unite...ch-2014-a.html.