Exaggeration does no one any good. Except a campfire audience listening to a tall tale. A reviewer must walk a fine line, between drunken glorification and frowning criticism. Sometimes the latter can help the one being reviewed grow as a writer. Invariably, hyperbole is injurious.
Having said that, occasionally a wonder is placed is front of one. Nothing amiss is found. Much that is splendid is found. On those rare occasions, I guess it's okay to adopt a celebratory tone. Just keep the accolades within the solar system. No work deserves certain turbo-boosted claims and orgasmic adjectives.
Note to self: when reviewing a text, be sober and always choose understatement.