No bro I played the adventure.
It's exactly as these two system in what it conveys except now you play a almost invincible behemoth with few different roles and everbody look similar in bulky power armor.
All the game does I already do in my Dark Heresy campaign with characters with more interesting looks, stories and such. I am well aware what Deathwatch means on the description gave by GW, still I was waiting for something more than "Here is ascension with different classes. Blow shit up. This is the game."
If you are a marine player go on right ahead you will love the game. If you don't like Marines, it's like reading a Black Library book about marines. it's too long, boring and there is no tension.