In reply to pepperpot:
I got a pair about 5 weeks ago. Have been wearing them without socks (as the box told me to!) and they are dead comfy. The toes look a bit clumpy, or slightly like rock boots, but they certainly don't feel like that. I went out for a run in them too - no blisters, no rubbing, nothing. Expensive but worth it I think!
Although be prepared to wash them every so often, because without socks - good lord they smell