I'm pretty happy with these for the price.  If you don't wear socks with them, the furry material on the inside will get between your toes, which can feel a bit freaky, but then again, perhaps you're supposed to wear socks!  They also feel a bit lumpy / unstable when walking around and the bottom coating is already starting to wear off after only a few days of wearing them.  Still, overall they are comfortable and fit well (I typically wear a size 11 shoe).  They stay on and don't seem to slip, and they are toasty, without being overly warm.  Overall, I'm pretty pleased with them.