As the fitBAG bag for my old Lumia 920 is also this absolutely perfect fit for the Lumia 1020. The smartphone is secure enough in the pocket so as not to fall out and the lining holding camera and touch screen clean. At the same time the bag is large enough to not "clamp" the cell phone - you can push it out easily.
Naturally by the perfect fit no further cases can be attached to the phone - my Nokia Charge Cover not that a wireless charging possible and is very thin. (This is not a negative point for me - it is only meant for your information.)
In the bag there is a 24 month warranty and I find that it is a price well worth.