I have received my Vibram KSOs in the larger size. I have been wearing them and so far, so good. The only problem is that the back still rubs against my Achilles tendon a little bit. To remedy this, I've put a small piece of sports tape on the back of each heel. This seems to have solved the problem.
These are shoes that you can forget you're wearing. I put them on this morning to go outside for a bit, and since then I've had no motivation to take them off. Normally, I immediately kick off whatever shoes I'm wearing when I enter the house.
The next step is to wear them on extended walks and then some running.
