Double bull. The poles and construction seemed more durable to me than some of the other blinds i tried, which was a major plus. The penthouse is good also and very roomy, i just liked the double bull better. I bought the T2, and for just me its ok but im 6'3" and shoot a 30" draw so it can get a little cramped when it comes to shoot, so i have to manuever around a little. But, me and my buddy who is also 6' and weighs 250 hunted out of it one night and he got his first deer, so you can still get two people in. I wish id of gotten the bigger one,but the T2 is plenty big enough.