I've had it on for almost a year now. I don't think I've seen a single advertisement that interested me so far. It's basically just spam, and in my way. The upside is supposedly money. People were (and still are) claiming "I make hundreds a month just browsing as I normally do!" but after almost a year of full-time Brave usage (a good 8 hours every day), I'm at 70 USD worth. And without giving up my privacy I can't really access it anyway.
But yeah, choice is a good thing.