Oh yes. Orange Box is fantastic value for money.
To be honest I bought it for Team Fortress 2 alone. Such a solid online multiplayer FPS and Valve have been doing a fantastic job supporting this game with new maps, weapons and unlockables. To this day (I picked it up on the Australian street release date, sometime last October) I still haven't touched anything from Orange Box besides Team Fortress 2. I really should play Half-Life 2's and Portal ...