I beat it about 8 hours after it was released. Not a bad episode but not as good as the previous one I think. The step up for the graphics engine is a nice update to the aging Source engine, though. I have never seen HL2 look so pretty.
I took screenshots the whole way through so I will be posting another gallery walkthrough like I did with the last episode.
On another note, the Portal game included with the Orange Box set is pretty damn fun and TF2 freakin' RULES!