The quality of fansubbing varies greatly depending on the translator too. For example, Crunchyroll uses ASS format for their own subtitles (things licensed from other studios seems to use a simpler format), and some translators do a really good job very similar to the fansubbers.

Case in point, I remember watching "Is the Order a Rabbit S3" in Crunchyroll, the English subtitles are pretty basic but the Portuguese (Brazillian) subtitles are great, including things like Karaoke in opening and ending.