While Mr. Grim has a good point, it is still a very fun atmosphere. Will it be competitive? Sure, it's a tournament. Will it be fun? Hell yes, it's a
doubles tournament. You hang out, plays some great games that can be challenging with lots of great people, terrain and tables.
I know there have been whispers of being "more competitive" and such but honestly, it's not typical 40k "competitive" if you know what I mean.
If it were as competitive as people have said, I don't think a Death Guard / Thousand Sons duo would do as well as it tends too.