This makes me sad. While it certainly isn't Goodfellas, I always thought Pesci and Stone's performances are top-notch and Pesci's exit from the film has stayed with me my whole life.
Also saw it this weekend and enjoyed it. Certainly an original take on a tired sub-genre of horror. The silent tension cut deep throughout the entire movie.
My only gripe is I saw it at a theater that had what were essentially rumble packs built into each seat (don't get out to theaters much so if this common nowadays, I guess Michael Bay is smiling somewhere) - it was distracting at first but worked decently well once you were use to it. However, if I ever saw a shoot-em-up / superhero movie in that setting, I'd want my money back.