It astonishes me that a movie set entirely on a computer screen can be in any way entertaining, and yet all the movies I've ever seen using that concept ('Unfriended 1 and 2', 'Host', 'Searching' and now 'Profile') are terrific. The concept requires a really well crafted script that moves at a lightning pace. 'Profile' does this extremely well too because it never feels like it's rushing either. I had a really good time with this movie.
The thing about this story is that it feels very real. Obviously it is based on a true story which helps, but the subject matter is very raw. Ghosts and demons attacking people can be scary, but it's always in your mind that they aren't actually real. Terrorists on the other hand are extremely real and are always in the deep recesses of our minds. This creates a very uneasy feeling that the film gives to its audience.
I was going to be very interested in how dark the ending of the film got. Found Footage films are notorious for having particularity brutal and ominous endings (one of the main reasons I lover them so much). I liked the ending 'Profile' went with, but I think I would've liked them to take an extra step further to really keep the film memorable. That's one of the only flaws I found though in an otherwise extremely good film. I highly recommend this one.