Summary: If you liked the first one, you should enjoy this expansion as well. I replayed Wings of Liberty right after I ordered this and still enjoyed it but I found myself liking this expansion a bit more. It has a little more variety in the missions and you're not just doing half of them to farm cash. I can't wait to get to the third installment. I played this on a somewhat dated MacBook docked to a larger screen but I had no problems at all (unlike WoW).
Summary: It's alot of fun to play with friends or by yourself. The Single Player campaign and storyline is top-notch along with the accompanying cinematics. Multi-player is a blast as usual. Certainly not the greatest game out there but very fun nonetheless.