Pretty awful. It was great when it was Google Music, but now there's literally 2-3 adds after every. single. song. Most aren't able to be skipped, but I also shouldn't have to have my phone on hand to skip multiple 5-15 minute adds every 3-4 minutes. Pandora has ads, but not to this extent AND Pandora will play in the background when you switch to another app. TL;DR this app sucks.