This album is underrated imo. As a concept album it is kind of fragmented I admit but outside of that the individual pieces shows incredible work that has a contrast between some of the bands most melodic and mellow work and some of their most heavy work yet the songs seem seamless. It was very raw and radical at times yet still professional along with demanding musicianship. The album is dark but inspiring and deep. This imho is an example in the heavy parts of prototypical speed and thrash which opened up the door for those sub genres a decade before most people ever heard of any such genres.
Rush was laying down the ground work in the 70's for such bands as metallica, iron maiden, queensryche, dream theatre etc which = them pretty much being a combo of those bands a decade before in just one tiny power trio and doing it with better song writing and musical ability imho. Rush was a super band in that first decade and the fact that they were so over looked is amazing but I suppose being so radical and cutting edge just confused the masses in those days, and it wasn't until people looked back and realized what they helped to create and influence in different ways in the world of rock and metal that they were finally understood and appreciated by more people.
Hail to Rush