As far as found footage horror movies are concerned, plots overall tend to fall on the predictable side. 'Untitled' is no exception with its (back)story that is nothing but skin and bones: friends shooting a documentary, some haunted place, group psychology drama, and yaddi-yadda. Still, the story slowly fleshes out thanks to character development and proper editing - enough to keep the audience intrigued throughout.
You will not lose your sleep over the characters' fate, you will not watch this movie ten times in a row... and yet it does a pretty decent job of adding to the genre, considering its limited resources. A sequel 'Untold' is supposedly in the works... until then, the 'outtakes' will likely put a smile on your face.
On the plus side: - authentic feel without relying on constant shake or jump scares; - characters that are believable and relatable; - landscape and premises put to good use.
On the minus side: - sound mixing flaws (a few mumbled lines... or is it intended?); - special video fx and (pseudo-)tech talk could have been more refined; - background music in the middle seems odd.