The game itself is perfect, better than Origins (which placed the bar very high).
PC support is however not great: you have to go online on Uplay key (case of many games on PC or steam but is done with), then to Uplay, offline and disconnected from our network card otherwise the plant computer games. It's a shame for a game as good especially since I bought it long after its release. Ubisoft has not made any patch or update for this and remain silent about it.
In conclusion, I advise Rayman Legends PC but not its support. If you rely on buying PS3, Xbox 360 or Wii U, buy eyes closed.