I have read quite a few reviews of kopi luwak, the legendary "civet poo coffee" from Southeast Asia.
From what I've found all the reputable coffee experts say it's pretty much a scam and the coffee tastes horrible.
There are also travellers who give it OK reviews but you can tell they're not experts and could just as well be giving it an OK review because they've been told it's the best / most expensive coffee in the world.
But hype or not there are surely varying quality kopi luwaks from sources of varying local reputation, and there are surely many fake kopi luwaks.
But have there been any reviews by trusted coffee experts who made sure they were getting a "good" luwak or who compared many and gave at least one of them a good review?