I've been playing for three days or so, about 11 hours in, and it's really good. I can see why it wouldn't appeal to everybody -- especially those who only have patience for fast-paced shooters. It's not perfect, either. I've seen a few small glitches, and some questionable textures (ex: a pile of clothes on the floor that looks really crude and drawn-looking up close). But the atmosphere of it is great. The controller takes some getting used to (which makes it harder than it might otherwise be), but still a fun game.
The game's Miiverse channel is pretty active with generally positive comments. That may be because most people who didn't like it didn't bother to comment. It's a shame that poor reviews are keeping people away. Although it's a very different experience, I kind of relate it to Deadly Premonition. Some people either hated it or just didn't get it, and that's a shame.