After reading the reviews I ordered 1/2 size up and am glad I did.  They fit perfectly with or without socks.  I'm not one for heavy socks, so I cannot comment on their fit.  I bought the dark teal which is on the blue side and is exactly what I wanted.  They are comfortable right out of the box.  No break in period for me.  They are fuzzy on the inside as well, except on the footbed.  I would highly recommend this shoe, and this brand, to anyone who wants a warm, comfy shoe.