My 8 year old sister got scared the first few minutes into episode 1, this show isn't meant for little kids or those that don't do well with violent-ish scenes. The show also had a lot of very conveniently placed escapes for the camp-goers to get out of their tricky situations.
That being said, for me - as a 23 year old - this show was highly amusing. Me and my brother marathoned through this and will expect to to do the same when (and hopefully not if) the second season comes out. I wouldn't say season one was great, but it was pretty good.