Can't say that I like text justified both sides and I advise clients against it. And with narrow columns I just say it is not an option. But so long as it is a reasonable measure, 75 characters was given me in my youth and it is a good standard, a maximum track of -3 or + 2 in Quark and a limited use of hyphenation. works fairly well.
BUT I look at the extremes that mediaeval scribes went to to justify their text and I think , am I deluding myself, in reality anything goes.