It's really well made and besides the walls cracking I loved the portal effect. Didn't care for human or humanoid enemies though, and that portal gun was a bit off.
yeah the gun was quite a bit off, but the cg effects were good.
I think in order to make it a movie that a general audience would go see, you would have to put in some more human element, ie. the guards. although i disagree personally. and would love a solitary human trying to escape glados.
eh. No glados makes me a dull boy... Portal gun was way off!