You can learn how to play the instruments provided. It is fun and easy to use, generally. There is the occasional moment where Yousician or your devices mic fail to pick up your playing properly, and Yousician says you missed/misplayed a note. It seems to happen very often with faster songs with eighth notes, sixteenths, etc. That may cause you to replay the song to get them 3 star ratings (which uses up your free lesson time, yeah, Im a pleb). Otherwise, it is a pretty great tool for anyone that wants to learn, or just hone their skills.