> The GUI looks great! 

Thanks!

> My proposal for the doc / manual and the human-python interfacing would be to more clearly describe what 'prepare fsaverage' includes and add some verbosity like e.g. our Raw object on initialization so the user 'knows' the schedule and it's status. 

I can add some logging messages

> For the second command, I would add an error message like 'fsaverage not prepared. please run set_default_subject' or so. Maybe we could even rename it create_average_subject or so.

Which second command? There is supposed to be only one, create_default_subject() :)