Great selection of new and old games from Valve, well worth the money as they are all still highly playable.
Portal in fun and innovative and highly playable, once completing the 19 missions you have time to go back and perfect each task unlocking specilist maps and bonuses, increasing the challenge rating without losing any of the fun. The entire game is very funny and the voice of the computerised "helper" is quite sinister.
Peggle is fun and reminds me of the old arcade classic Arkanoid, it can be addictive but unfortunatly it is only a short game and is over way too quickly! You do have the opportunity to purchase the longer version, I would say its not that addictive though!