This Baldur's Gate collection gets you both games and their respective expansions - total value for money. Each game comes on a DVD (with the exp. on a seperate CD), so you don't have to change CDs like in the old days. All areas are accessible from their DVD, and from the expansion CD once you engage the expansion. The game isn't very resource demanding either (minimum CPU 300MHz, 64Mb RAM, DVD-ROM), so you don't need a top-of-the-line gaming PC to play it. Simple, cheap and a world of fun... hence the quote from the geek from "The Simpsons": Best... game... ever.
The game itself is an absolute gem. Starting out in the small town of Candlekeep in BG1, you set out on a quest to learn about your heritage and find your place in the world. Sound simple? Well, it ain't. As the story goes on, the web is spun ever greater and so is the world you inhabit. A great amount of subquests help you find yourself and shape your character... you choose your path towards good or evil - or something in between - and build your party of followers and friends accordingly. You will fight (a lot!) your way through the various areas (and reload whenever you die), killing monsters, adventurers, bounty hunters and bad guys and becoming very, very strong doing it. You choose your alignment (good/neutral/evil) in the beginning of the game, and what type of character you want to be: fighter, spellcaster, thief... and you set your abilities: what kind of weapons you're good at using, your strength vs. intelligence, constitution etc. As you level up from all the experience, you continue to advance in these skills, becoming quite a character.
The story line is one of the most impressive I've seen in a game; the continuous progression throughout both games, the inclusion of the quests and subquests in said story as well as the development of relationships between the people in your party just sucks you in and presto! it's three in the morning and you begin to consider staying home from school to play some more.
Seriously, there's a reason why this game has a huge pack of fans around the globe. It contains so many races, so many stories, so many things to collect, sell, buy and use for your benefit... so many people, so many areas, so much to do that after a while you begin feeling like it's actually your REAL life going on inside that monitor in front of you. Just the way we geeks want it...