I bought this shoes to use on triathlons since they state they can be used without socks. So far, the experience has had it's positive and negative aspects. I have used them in 2 tris by now (one using socks, the other without), and also for training and some longer rides.
I had suffer minor scratches here and there when using without socks, but nothing too uncomfortable, and luckily that have not affect me during my competitions. I would just love that they caused no scratches at all, but I guess I will have to get used to that ...