I got one of these for my iphone 5 when I first bought it. After it little while it lost it's shape and wasn't as snug as it should be. This meant little bits of dirt and grit got in and I ended up with scratches and little nicks all over the back and bezellesson learned.
Thanks for the heads up.
May I ask what you have used in the meantime?
I mean, paying £35 for the leather ones is just too much.