I'm about 195 lbs and have the Aksium Race set on my bike. I'm not a fan.
My personal experience is that they are very soft. I'm currently running my rear brakes much further open than I would like to avoid rub when standing or sprinting. I'm currently waiting on a set of wheels being built by my LBS.
Some people have mentioned getting the spoke tension checked (which I have not done) but my spokes 'sing' the same song when I pluck them and they seem nice and tight. (I don't want to spend the money to get the tension checked when I know I'm getting new ones soon).
I wouldn't recommend them, but maybe I just got a bad set.