Their latest album is more... generic? or casual. They have become very influenced by american music :/ (it was also released in full english in america so that might have something to do).
Their earlier albums are much better.
Some of my favorite songs: Never let this go, Wherever you are, Kanzen kankaku dreamer, CHAOSMYTH...
I'm sure you'll have fun eitherway, they know how to put on a show