FTG Writes: Phone cases should look good, but not at the cost of protection. If the best looking case in the world does nothing to save the integrity of your phone, then it was just a waste of money. Musubo’s cases for the iPhone 4/4S look like they would fit the bill for function and fashion at first glance. Immediately, their Double X case caught my eye. A revealing design uses the negative space in order to show off the iPhone rather than hide it away. Does that mean that the Double X is bound to allow harm to fall on your phone? Or does it offer more than just looks?