Your enjoyment of The Orphanage will come down a lot to what you want from your horror movie. There aren't a lot of cheap scares, nothing jumping out at you, but there really aren't many big scares at all. There's a couple moments that I found effectively spooky, but that really isn't the point of the movie. It's really more of a mystery and emotional drama with a horrific concept at its center. Yes there's ghosts involved, and yes there's a paranormal investigation akin to something we'd see in Insidious, but it's not about the spooks jumping out at us, it's about finding out what the ghosts want and the emotional journey of this woman and her child. In that sense though, it's pretty godamn effective. It is in many ways something of an adult fairy tale with a sinister edge, and I really liked that about it. Know what you're getting into, because it can be crushingly depressing, but the story works.