because I liked the first one. Is this one any good ?

I thought the first one was really good and enjoyable, but I was a little disappointed with the sequel. It is a pretty good game, but it just didn't pull me in as the first one did, and I think bugs and glitches had much of the blame. I had to restart save points because of glitchy stuff like minions getting stuck in the environment when I needed them. An example was in one of the first missions, where the red minions need to carry out their hive, and you need 10 (I think it was) of them to lift it up. Only 8 red minions came when I called them because 2 of them were stuck in a casting animation from our last enemy encounter... Stuff like this, and random game crashes, happened a little too often in my playthrough.
 
I played the first one on the 360, and the sequel on PC.

You got it on Steam, if there are patches you already have them. As for if it's good, eh, go play it and see :-)