"As a whole, the album is a dud, however not for the first time they show their prowess at making sprawling epic tracks, with the title track the main thing worth listening to." (bartyMJ, B, )
"The epic Octavarium makes this album. Most of the other songs are OK, a couple weaker ones." (zwordser, A, )
"While not a bad album by any stretch of the imagination, I feel it is Dream Theater's weakest effort. Only two tracks really stand out as fantastic." (HughesJB4, F, )