DAMN IT JIM, WHERE IS THE REST OF THE GAME?
Why only 4 stars then? Well, in a nutshell: GREED.
Apparently BLIZZARD is trying to turn the StarCraft franchise into yet another World of WarCraft phenomenon - and, at the same time, using STARCRAFT II as the vehicle, BLIZZARD is trying to turn BattleNet into the new STEAM. Unfortunately this results in a barely palatable product and using your fan-base to advance your corporate ambitions is always tacky.
Although priced even more than a full premium game, this is not a complete STARCRAFT sequel. You would not know this by its price-tag(!) but this is only A...THIRD of the game, the first part of three: you can only play the Terran campaign. The Zerg and the Protoss campaigns will be released independently later (and priced as if they were full games, one could safely bet).
To add insult to injury, one has to keep spending even more money if he wants any "premium maps" and "premium units" sold only via the BattleNet. Since this is a game that will be played mostly online don't be quick to dismiss this if you have a competitive streak.
OK, LET'S NOT TALK ABOUT IT - BUT THERE IS A HYDRALISK IN THE ROOM, ISN'T THERE?
Much more serious is the NeverLettingGo-OnLineActivation requirement. The game will ask for activation during installation, which also includes signing up to BattleNet (and, yes, this means that even this expensive game never becomes yours to keep). But that is not all: a periodic OnLine confirmation is also required after that, FOREVER. Installed a patch? Reactivate. Added some maps? Reactivate.
Unlike the latest EA and UBISOFT flops which have an idiotic Always-ONLINE requirement, you can play a single player game (campaign and skirmishes) without logging on to BattleNet - only, to do this you have to log on as a ..."Guest" (I know, a Guest to your own game and your own computer...). You will be able to save your progress but you cannot tie it to your BattleNet account later, so any progress or accomplishments are lost for your online Account. You can decide if this bothers you. That is why a Broadband Internet connection is included in the minimum system requirements.
SORRY TO BRING THIS UP BUT SPAWN SEEMS TO BE MISSING FROM MY COPY...
Remember how we could take our original STARCRAFT CD to a gathering of friends, Spawn it on everyone else's PCs and start a LAN party? Now one can play with his friends only through the BattleNet - and the Spawn function has been eliminated! Yes, that means each one of your friends now has to have his own original copy of the game!
The brass at the top conveniently forgets that the ability to Spawn games was the main reason both STARCRAFT and DIABLO acquired such huge fan-bases.
Et tu, BLIZZARD?
There are several people complaining about lag as well... I guess battle.net could have that ironed out eventually but it still seems like waaaay too much money for what you're getting right now. 
