I have some experience using services like this, so I have a fairly objective opinion. At first I was a little worried about loud words such "All types of essays" or "100% plagiarism free", but in the end of all it's true.
Once bought Blackberry phone just to try something different. Wasn't waiting for something amazing, that's why wasn't disappointed, but overall its concept is not for me.
I don't know why, but I've discovered Spotify just few months ago. I've heard about it, but used SoundCloud. But once I tried it out it fully replaced the last one.