awful. it slows down your browser because it has to load on every page, and appears on every image whether you want it to or not. if you view image heavy sites, that's a lot of processing power. then when you do save, the pin may be deleted, a whole board can be removed, and/or your entire account may be banned for guideline violations, which are handled by ai. you only get one appeal, but they can do double jeopardy and change their decision, ie reinstate a pin, but then go back and flag your account a second time on the same pin. they usually don't reinstate pins, and the metric is very kneejerk. i had 5+ pins of a video game character flagged because he had bare shoulders. i had an entire board removed for discussing things like mental illness. when you reach out to them, they don't respond, and users have found that support email addresses listed on pinterest send a message stating it's no longer in use. people with decade old accounts have been banned over it. half of my screen when i'm on pinterest at any given time is ads. i recommend checking reddit.com/r/Pinterest/ to really see the actual user experience, and how much pinterest doesn't reward user loyalty