The psychological thriller The Glass House has an interesting set up, but fails to deliver any true terror. The plot follows two children, Ruby and Rhett Baker, who are orphaned and taken in by their parent's friends, the Glasses, but before long Rudy starts to suspect that the Glasses have a sinister reason for having taken them in and could be behind her parent’s deaths. The cast has some impressive talent and features Leelee Sobieski, Stellan Skarsgard, Diane Lane, and Bruce Dern. However, the script is a little weak and leaves too much ambiguity to sustain much tension or suspense. And before long, the story falls into formula and becomes pretty predictable. While there’s some mystery to The Glass House, in the end it’s rather underwhelming and lacks real peril and danger.

Yawn..... This movie bored me too death beyond belief

What's important to understand about _The Glass House_ is that it is a psychological-horror movie. It's not a thriller, it's horror.
With this, the movie does suffer from its PG-13 rating. While I think it could have implied darker subject matter and kept the rating, I want to see an R cut of this.
Now, when the movie wants to be tense, it does so very well. It has all the moody gothic-horror thunderstorms of a much older film by James Whale or Alfred Hitchcock.
The obvious standout here is Sobieski. Lane, and Skarsgard are also great in their roles, though I wanted more from them. This is why I mentioned the rating, I think Stellan was not able to go 100% creep mode here. Furthermore, Lane needed more room to play up her [spoiler]drug-addict Stepford wife.[/spoiler]
I'd recommend this for anyone who would enjoy a PG-13 version of what feels like a Stephen King story. Me, on the other hand, I'd like to visit a parallel universe where Stephen King wrote this, and it was directed as a much darker horror movie.

One of my fav movies