HiBTC is probably a scam. I haven't heard much about it lately but there was a story about it scamming people and from then on silence. Try searching about it here or on Reddit and all you'll find is about it being a scam.
It is not a scam. I have buyed over 2 bitcoins from there with no problem. I dont know about other people, but everything worked smooth for me. They are Europe located, and I do too, so I think that would be the best exchange for me.