Refuses to translate several normal things. Can't translate bigger chunks of text. And even if I cut it to pieces, translations lack in Context a lot (get the pun here?).

Always takes sweet initialization time, when it really shouldn't - let me paste the damn thing first and then I'll wait all you want! Overengineered monstrosity.

It is inconvenient that I have to press the field yet again after swapping languages. Tab key navigation is very poor. Preferences aren't integrated with browser, which leaves a bad aftertaste.