Its not particularly dangerous when compared to alcohol, but its definitely not harmless. It isn't addictive in the sense that it causes a chemical dependency, but its very easy to over rely on because its simply a cheap easy way to feel good. There was a period in my life where I would say I was addicted to it. Any other pleasure in my life wasn't relevant unless I was combining it with marijuana, and despite what I believed at the time it didn't make me creative or productive. I was a walking stereotype of a lazy stoner. I only quit because I was forced to after losing my job for a surprisingly unrelated reason. I felt like garbage for days on end after stopping and only then did I realize it was a problem. At this point I have a much healthier relationship with the drug, I usually only partake in social situations with some rare exceptions. How bad the drug is really just depends on who's using it and how they're using it.