Planetary Annihilation - Good Game? Or Not?

Have bought it thinking it's the sequel to total annihilation. Like its predecessor clarity of gameplay is amazing, there are units everywhere but instantly can identify the different sorts. Colors are beautiful. Almost not played it for now because of much games, but it's certainly a great game.

But be careful, tutorial is not evident, almost inexistent. And master game seems pretty hard.
And it appears that a good computer is recommended. (If your computer isn't good don't buy.)

There is not singleplayer campaign even if can play skirmish vs computer.
It's multiplayer dedicated game.