I let it be known to all my close friends that I'll buy them a copy of Disco if they ask at a drop of a hat. Easily my favourite game.
W.r.t violence, it is indeed present as a murder is the center of the story, but it's always in service of a story about self-discovery, exploration and a talking tie.
Also, if you like Disco, check out The City & The City [0], it inspired DE and is a great time.