I am deathly afraid of heights, but I find overcoming that sometimes makes me feel accomplished. I hated parasailing though. Definitely didn't feel safe up there. Every time I've ever gone zip-lining, I had a blast. Mostly because I felt safe in the harness. I think you'll enjoy it :)
I don't find it scary. But for many it is, especially if your scared of heights. Its definitely exciting.
If heights scare you then this will probably be a problem, if not then it will be fun.
Idk but ya if your afraid of heights then ya it's scary