This is a nice silicon case but it doesnt have any screen protection.
Dont buy if you want to protect your screen.
As for the wire management, yes this works well and it doesnt bulk out the case at all. It can also be removed if you dont want it.
You can easily put the wires around it saving space and protecting them from potential cut but the zip in the zip pocket. It also looks more aesthetic comparing to pushing the wires in to the pocket with your Zen. The skin protects your player from the scratches and dirt. The only think that put me off is that the dirt easily sticks to the skin and look dirty but you can wipe it off or wash it in the water and the dry it. Aslo the plastic part on the back which attaches the wire management part look cheaply. However, it is very helpful after all, because you don't find you headphones wire tangled up and the price is low.