This album is such a step up from Aeon Zen, easily one of my contenders for album of the year. I have their previous two albums and, while those are still great, Enigma shows a lot more maturity and better song structures / writing. It took me a few listens to really appreciate it, as there are some pretty contrasting styles, but it all fits in perfectly with the flow of the album. And being a concept album you really have to listen to it as a whole instead of a track here and there like you get with the youtube crowd these days.
And if you're put off by the person that gave this album 1 star (how is that even possible?!), it seems that they confused this album with a band called Enigma, so I think you can safely disregard their comment! This album is simply a masterpiece!