I haven't tried them. This is one of those things that I'm less inclined to try, even though I love trying new things... too many people have described it as "like eating phlegm" that I get the feeling I'd vomit it back up if I had a go. :S

I don't really have many opportunities to try it, mind you. Maybe if it was free, in front of me and I had the right mood I'd give it a go. But I'd definitely need something to spit it back into ready for use...