thats completely untrue. While there is some slow down in places it is virtually undetectable and certainly negligable in comparison to the great storyline, playability and value of the package.
Half life 2, episode 1 and episode 2 are all good quality lengthy games with quality graphics and gameplay
portal is a challenging puzzle game which is worth the money of the package in itself
team fortress 2 is an incredibly addictive multiplayer game giving the package playability over time as it can continue to be played after the single player games have been completed. Once again, team fortress 2 is worth the cost of the package in itself again.