Europa's quite fine with me, I just couldn't consider Goodbye so well, though. Wait a Minute is above decent. Back Hug is sweet and nice. Soul is like...no. I liked the Chinese version better even if it is much harder to sing along. :|
When I first listened to the whole album, I was a bit disappointed that it doesn't have any cute songs (e.g. "Say Yes", "My J").
Anyway, "Mr. Mr." itself is good song, though not as good as IGAB, proven that during our recent SONE gathering, we cheered much louder and spazzed longer while watching IGAB performances compared to when we're watching Mr. Mr. performances.