Hills was great. Walked out of Mirrors at the theater, it was dreadful and not in a good way. Piranha was pretty much meh. Now on to High Tension.
Spoiler...
Some of the kills were interesting, but certainly Aja had seen Identity with John Cusack because it felt like a complete ripoff of that.
As someone else said, I like Adam Green's work and for me, he is the superior horror director with the Hatchet films alone. Hatchet won't win any Oscars, but it was fun and a great new killer in a genre that needed one.