My 13 year old daughter has a pair of Uggs.  I was not spending another $200 for boots (especially when nothing is wrong with the pair she has).  These boots fit great  (seh wears a women's size 7) and she absolutely loves them!
We did spray them with the rain/stain protectant you can but at any shoe store for pretty cheap.  Her feet have always stayed dry and warm while wearing these boots.