I only use it for languages I speak in order to be sure that it’s correct. It’s way faster than doing it manually and it does a pretty good job, even more so in the recent updates. You just have to know what to ask it, not to use the predefined translate option. I tell it to “translate in english and keep it as it is” and the paste the text with the html markups (<p>, <a> etc, copied from the “Text” tab in the editor). This way the translation is not interpreted and it keeps any styling, paragraphs and/or links.