Exactly what it should be and what it set out to be.
Take a look at the many sequels that have been released. You will always see elements that you have missed from previous games. This time, it is not the case. Starcraft II adds in everything you loved before and then simply brings it into the 21st century. Everyone who enjoys RTS will like this game and that is another reason why blizzard is so successful. They have the mass appeal. I have no doubt in my mind that blizzard's next games will continue to capivate.
I have heard people complain about how it is hard to run on their computer and complain about, at the same time, how this game is just a copy of the first one. To all of you I say, just keep playing starcraft I then. But if you choose not to upgrade your computer you are surely missing out on beautiful visuals that, alone were enough for a sequel.
You simply cannot be dissapointed with all that this magnificent game has to offer.