I'm not quite sure if Superhero Girl's roommate is being "nice" by saying SHG looked good fighting Marshmallow Menace, or if she actually thought SHG looked good. She seems sincere. This actually reminds me of times where I've really enjoyed something by someone (say an artwork by a fellow artist), told them so, and have been privy to very long rants about why the work is terrible.
Which, being an artist who can't stand her older work, I COMPLETELY understand. :D