First of all, the site starts by playing music for you. You can skip any time you want. On the other hand, if you like a song, you can find out more about the artist and if you really like a song, you can "heart" it after listening for 60 seconds.
My new favorite feature is the "Quests." The site gives you tasks to complete such as listening to 7 different new songs or listening to some of the Mood channels (another cool feature). These quests are an interesting way to get people into new music and to learn the features of the site.
The only thing I am not wild about is sometimes not being able to dismiss popups, but once I figure that out, all will be groovy.
Anyway, if you like being exposed to new music, check out this site. It is quite worthwhile.