I have an Active Ankle T1, and I've been really happy with it. I turned my ankle badly a couple of times last year, and needed to do long adventure races shortly afterward. With the brace, I could do everything. I wear a size 41 shoe, and my Active Ankle is size Small, and it doesn't seem particularly tight.
According to the
Active Ankle website, the T2 model is "sleeker" and uses thinner, lighter weight padding. There is also an adjustable single strap for different heights of shoes. That would undoubtedly be useful. With the T1, a couple of us moved the lower strap higher to prevent blisters being formed between the strap and the shoe.
While wearing most of my shoes, I don't even know the Active Ankle is there, but there is one pair that makes the brace rub my foot, causing blisters. I could probably play with insoles or tape the affected area to prevent this, but I usually just use different shoes if I'll be in terrain where I still want the brace. (It sure takes an amazingly LONG time to recover completely.)