gg has the best subs since they use the close captions, making their work the most accurate. Sometimes they flub on lines but overall it's the best sub.
A pity they're shitcunts so I don't watch their subs anymore anyway, LOL.
Eclipse's translator appears to be a newfag to the group, or the one who did Fate/stay night. Good subs but no closed caption (even though they're available to Eclipse, wtf) referencing and a lot of misinterpreted, literal translations.
Chihiro is the shit sub but it's also the fastest, and some of their lines (amazingly, the ones gg tended to stumble over) are better translated and make more sense, but their subs are less comprehensible than Eclipse's.