From my (practical, rather than fashion) experience, yay if you have narrow-ish feet, nay if you're like me and have normal to wide feet 
I bought a leather pair from oasis TWO years ago, and only realised how uncomfortable they were on my feet when I took them outside (so no way to return them anymore). My toes were in agony. I am still thinking of selling them on ebay, but I have no box to put them in anymore