The Roost is just fine. It's a micro-budgeted indie picture with a few sequences worthy of any mid-level horror show.
It's not pefect, nor is it particularly original. But it's a professionally mounted, pleasantly forced-irony-free and expertly wrangled debut with really a great atmosphere, keen sound design packing it with genuine dread, which these days is more than enough to pique interest.
Ti West's got a real talent and I can't wait to see what he does with this.