Just got my pair today. I usually wear a 6.5, ordered a 7. It is a bit loose. So I think it should be true to the sizes. The soles feel a bit cheap, comparing to my UGG. And they don't give you much support. But it's soft and very comfortable. For the price (its list price is half of UGG's, and I got them on sale), I'm very satisfied. It's warm and fits my bill. It seems warmer than my UGGs. Hope they won't break after two months, like the other reviewers said.

UPDATE: I found two holes on the sole already. I did wear the boots almost everyday since I got them. They didn't last long.