I’ve seen many more coffee folks who have opinions ranging from “it doesn’t taste different than the local coffee” to “it tastes downright bad”. James Hoffmann has a good video on it: yewtu.be/watch?v=pkbuFwHnJQY
Primary thing seems to be the quality of the coffee cherries the civet eats. So if it’s just force-fed coffee cherries, it’ll be no better than normal coffee. If it gets to choose on it’s own, naturally, then it may pick better coffee cherries and the coffee may be better - but not because of the digestive process, most likely.