Love these boots, I think they have to be the best boots I have ever owned. At first I was concerned that there wouldn't be support and that the boot would flood. The top of the boot makes a 3d shape to block out water and the straps give great support and don't allow flush. The pieces of rubber around the sub sole make the boot none slip and creates a cradle for the foot to be stable. Excellent.
Just got my new CYRO boots and my cryo hooded wetsuit, I am warm and can't recommend them enough. I just ordered my gloves and can't wait till they get here.