Tried it out. I wouldn't be able to fit two of my rollup bags (OSK, 40" long by about 9" diameter) simply because the bag tapers toward the top, but I can fit one OSK plus my old smaller "quad bag" (13 kites, 3 extra frames, 3 handles, 7-9 linesets, etc). I added two throw pillows to simulate clothes. Everything fits without feeling tight:
A bit, but not too bad. The flap on the upper front isn't an external pocket, it's just the "lid". There's a long side pocket and a hardshell compartment (for a cap or glove I guess). The side compartment still has at least 2" depth left when the bag's full. The cap compartment shares some space with the interior, but the hard lid leaves a lot of space too:
The biggest drawback is that I can't open up the entire length of the bag, so I'll have to pack things in from the bottom up. But overall I'm pleased.
EDIT: I forgot I was going to ask - anyone know what that little hook is for (the one that's circled in red in the side pocket pic)?
There's some being sold on this forum right now. First thing you see at the top of the home page. Mike's kites look to be in good condition, but you can ask him directly regarding that. I would recommend a full vent to complement the MoJo. Keep smiling. Have fun. Watch the tutorial videos again and again. They keep on giving.