It performs very nicely in the wild. One of the nice things about the "real time" aspect of this app is that you can nudge the phone around until you get a good translation.
What about smaller type (and sometimes weird fonts) in somewhat dim environments – I’m thinking of menus, that seems like a typical situation where translation is necessary for tourists.
I've known about this application for a long time, Otavio showed me an early prototype of this running on his laptop over a year ago. I'm ecstatic that they finally released it.
(I'm also happy that I was able to get their story on HN before TechCrunch :D)