There's 50/50 chance your ad bonus won't apply. At one point, I watched 4 ads to get it. Kind of annoying to watch something for no reason over and over. It also lags from time to time which can ruin your entire mission. Then you get to start all over and hope you can get through the song without that happening again. I like the concept but too much frustration due to lag once you get past the "easy" missions.