I like reviews for a few reasons.
The style of writing, the cigar is unknown to me (or hard to find, very rare, extremely old, etc), past reviews by this person have matched closely with my experience.
IMHO the best use for a review is to calibrate the reviewers taste buds with yours. Kinda like when you hear someone say "Celebrity X is so freakin' hot !!!" and you think to yourself, "eh, they're not that hot, they're just average" and you then calibrate that person's opinion with your own. Next time they say something like that about someone you've never seen you've got a better feel for what they mean.
(did that to my buddy the other day - he said "So-and-so is so hot!!!" and I gave him a funny look and said "Calibrating. Calibrating."
)
However, even if I buy a cigar based on a glowing review I still go in with the knowledge that I may not like the cigar at all.