Only problem I've had with the subs so far is the awkward as shit phrasing sometimes
Though it's not that often that I've come across those types of lines and it's fine for the most part. As someone who doesn't speak japanese that's as much criticism I can give it. Only argument I've seen against it from people is "that's the guy who did the geki scrub" and then not say what's wrong with these subs specifically.
Whose subs are you watching?