I have a Lumia 520 Case ordered me 2x, once for me and once for my friend. On the day that the envelope has arrived, my phone is broken and I got myself a Lumia 520. I Handynow written and asked if they can change the shell. Your answer "Conversion not necessary, we will send you a free Lumia 720 shell if you want, you need one or two cases". I think that's just great, and the shell was there the next day!
To cover: Until now I have not found any problems. The sleeve is keeping the phone very well and looks far from se Top. If I notice flaws I sign this.