I bought these boots for myself as a Christmas gift.  As soon as I tried them on I didn't want to take them off.  They are very comfortable just like wearing bedroom slippers.  You don't need any brake in period.  They are comfortable right out of the box.  I really don't like wearing shoes at all but I definitely love my UGG's.  These are the first pair of boots that I always go to when I go to work or just hang out with friends.  I sprayed them with water repellent so I can wear them in the rain too.  I definitely recommend these boots.