I'm a firm believer in always buying the right case when you buy the gear... It makes such a difference to keeping stuff in good condition.
This bag is a perfect fit for the mixer and has a rigid top cover which protects the iPad if you leave it docked and/or locked in position. there is room at the side for the mains cable which is nice. It would've been good if there was also a bit more room to keep an airport express in there with it. The bag is very well made, like all Mackie gear, and should last a long time (at least as long as the iPad!)
Nice shoulder strap for carrying, and the whole thing with the desk inside is unbelievably light, I can't get over how compact and light it is after lugging around a Presonus Studiolive 16.4.2 for a couple of years (although I did slightly prefer the presonus preamps...).