I wear Pod K700's, seem pretty good, Monza Imports had em on special $350 for the pair !!!. I had EVS before these, hated them! None are as good as my custom-made CTi brace I had in the 80's (worn-out now).
What I think is important is that there isn't too much leg coverage as the leg gets very hot, needs air circulation.
I would like to try the Asterisk's, I find with a hard-formed top arm around the thigh, that it moves away from the leg as the knee bends, maybe my knees (both artificial and original) don't follow the same arc that the brace hinges do?
With the Asterick's and the mid-priced CTi by 'Inovation Sports', they have a flexible top fitting brace that would stay in contact with the leg through the whole hinge arc (I presume).
Goof & I had the first CTi braces in the country, I read about them in Motocross Action, I contacted Inovation Sports in California, they got me to sketch around my leg and post it to them, they custom made it with my name embossed into the carbon fibre.