I use just plain dark gray/black translucent rubber or can u call this silicon?
What I like about this:
1. Adds grip and body to the slippery arc.
2. All buttons are covered, even the volume, power, camera button, and the front android buttons... they will stay scratchless.
3. All openings are accessible / uncovered, precise fit.
4. No need to raise or release stupid clip(s), just use the phone.
5. If the phone is dropped for some reason, the material will reduce/absorb shock, unlike hard covers.
What I don't like:
1. It attracts lint when placed in pocket.
2. It covers the XPERIA and logos at the back (well I don't need to show anyway).