It doesn't seem to work. In fact, IIRC, they simply add a huge button dialogue to any such emails that pass due to a filter to mark it as spam, without any but

It doesn't seem to work. In fact, IIRC, they simply add a huge button dialogue to any such emails that pass due to a filter to mark it as spam, without any buttons to dismiss their improper suggestion — e.g., you can't even confirm that the mail isn't spam anymore if you use such filters.