Good game, especially very coherent single-player campaign caution with old graphics hardware ...

As a player of its predecessor one feels relatively quickly at home, there are a lot of parallels.
The game is really fun:
What is very positive is the new BattleNet which one for each category Multiplayer (1v1, 2v2, 3v3, ...)
and your team can make 5 games first auditions and then you start depending on the points and skills in the relevant league.
What is also nice:
If one has had as poor players, but played very well despite defeat
You can get bonus points and so still not crash in rank ...

The single-player campaign:
Provides units and research opportunities that do not exist in multiplayer.
To definitely recommend for beginners before you plunge into BattleNet ...

Biggest gripe for me is that it has very high system requirements:
Have a laptop with 4GB RAM and 2.2GHz dual core processor but only 128MB DirectX 9C (ATI X1300) graphics even with 1024x768 resolution and lowest details it can be when more units are produced,
Battles take place hardly operate.
(1-3 fps ...)

Because you will find it so bad:
Minimum System Requirements *:
* Windows XP / Windows Vista / Windows 7 (Latest Service Packs) with DirectX 9.0c * 2.6 GHz Pentium IV or equivalent AMD Athlon processor
* 128MB PCIe NVIDIA GeForce 6600 GT or ATI Radeon 9800 PRO video card or better
Recommended Specifications:
* Dual Core 2.4Ghz Processor * 2 GB RAM * 512 MB NVIDIA GeForce 8800 GTX or ATI Radeon HD 3870 or better

Will customize the report as soon as my desktop PC is upgraded ...

All in all I would recommend this game very,
Respect for "addictive" is high ;-)