I just picked up a few of these, I started with the pink angel ones and the black succubus ones. While the succibus ones didn't impress me much the angel wings are huge and impressed me enough that I went back and grabbed them in black as well. I think they make me move faster than any of my other locomotions.
for anyone who is wondering i got the broom that is also available, you cant switch or anything you jsut stay on it. it has a different pose for male and female, the are similar. it works really well with things like the free pottermore outfits. the only negative is that it moves in your hands when you talk because you are holding on to it with one hand. so you pull it out from under yourself while talking but stay floating. but hey its only $1