I love these shoes so much, it's my second pair.  The Un. Structured Clarks are by far the most comfortable.  I do a fair amount of urban walking and I wear these 4-6 days a week October - May. My last pair held out for 6 years before the sole wore thin.
These I have had for a couple months and they still feel tight.  I like thick socks in the winter, but even with thinner socks they feel a half size too small.