Just got my Füm today and tried it immediately. I do like how the air control also doubles as a fidget device. I got the entire cores bundle, so I tried the orange vanilla and tasted a faint flavor, but kinda underwhelming, however the stronger flavors like the mint it great. Overall this is a great product, but I think the more subtle flavors need to a little more intense, so I'd say so far mint is my favorite.