Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The most underrated album in history

Every rock fan agrees that there are bands that deserve a lot more attention than they have. The guys from Captain Beyond are the perfect example.After being kicked out of Deep Purple, Rod Evans decided to form another rock group and with former Iron Butterfly members, Captain Beyond was born. The California-based band soon became a cult hit and remains so until nowadays.A mixture of hard rock, stoner rock and a bit of prog rock, this album is simply phenomenal. A perfect and brilliant sample of what underground rock bands are. One of the albums I would recommend to everyone. Captain is now, unfortunately, a defunct band, but whose sound will enchant me forever. This stuff is required for every classic rock fan. Hear it now!