Considering the fact I did in fact seen many movies like Cub, I'll try to keep the comment short. Why? Well, maybe I got tired of repeating myself, as Cub copied other productions before it.
It kinda feels like a blend between Wilderness and Haute Tension, it could be considered an OK movie by people that are strangers to horror, especially in the woods type. Not horrible, not bad, not stupid, but not that new either, does have that gory touch, to make it more shocking yet it still doesn't seem enough.
You could watch it, not for scares, but to see another horror, if you're a fan of such movies, and this will be the only reason I can recommend Cub. I'm glad I did, had a little portion of fun with it, found it an OK horror, considering I've had my share of such films, seen plenty and will continue to do so, thus, Cub, a 5/10 stars film in my books, feels like a breath of fresh air comparing to other non sense.
Cheers!