Now I am going to assume that mellowness and cross influence is something that most prog bands use to get the prog classification in the first place, so we'll get this out of the way first. This album has a lot of mellow jazzlike influence while also being blatantly metal in its stylings. There are a lot of ambient effects on here on top of some acoustic pieces which are blended in with kind of an ignorance towards song structure and other similar aspects. Songs like the title track, "Evolution", start with this bassy jazz style and just come into the metal part with no care as to the credibility of such a transition.
The music other than the fusion has a lot of off timed and off the wall playing occurring. The drums are going at a relatively constant rate at the same constant speed, giving at least some glue to hold the music together. The guitars though, they are doing everything and anything in each song. Though, they are presenting a pretty good feel that anyone who likes to zone out to a song would feel almost instantly. The bass, as i mentioned earlier is carrying on it's own lines to add to the song more sound rather than reinforcing the rest of the music. This almost leads to utter chaos, but the drums still hold it together. The vocals though, they do not care what is going on, they remain at a constant rate throughout the songs and do not give much attention to the changes of pitch in the music.
This is much more of an instrumental album than it is a vocal album, and i would say if you can tune out the vocals, then this is for you.
I recommend this to die hard prog fans only, as i can see how some people would have a problem adjusting to the off the wallness of this album.