This expansion greatly increased the replay value of pandemic. I especially like mutation change. The original was really interesting at first, but I feel like I was able to beat it. The expansion put in play some things that really make you have to think and strategize more. Its a good buy. Especially if you feel like pandemic is a good game but that you've beaten it.
This is a really great game. The strategy changes depending on who you play against, the expansions make it so that there are infinite possibilities and different game plays and the replay value is high. I highly recommend it.