I've been reading some of the TerraOnion forum, there's a few things MODE doesn't do which I wish it did.
Firstly, there's no in-game return to menu! At least on DC, the dev said you could use DCHDMI for that, but obviously most of us don't have that installed. Second annoyance is that you cannot transfer files from the microSD to/from USB or SATA. So if you have to add games seems like you have to open it up and remove the HDD.