I haven't played it yet, but I've seen Pewdie's let's play. I agree that the graphics are AMAZING, I really LOVE what they've done with the pages and that you need keys for certain places, and find the overall atmosphere more creepy than the original Slender. I didn't 'jump' as much as with the original Slender, though, which is, in my opinion, one of the most important aspects of a 'Slender game'. But if I actually play the game myself, then maybe the jumpscares will get to me.
EDIT: Okay, downloaded and played it for the first time... And yup, the jumpscares got to me. XD Although I only played for a bit, seeing I died pretty quickly. (11 scraps left... -_- ) Laugh at me or not, but I kinda screamed when he got me. XD