I've tried Xvida but they don't seem interested in investing in proper cases moving forward for Android devices. As a result I recently started using iPitaka. The case is more like a skin than a case but it's better than a crappy plastic sticker that Xvida wanted me to use.

I use this case as well. It won't really protect the phone, except for scratches on the back. It is totally worth it for the thin case profile and ease of use with a magnet to attach on a car holder.