This case is great, especially for those who don't like to bulk up the phone with some of the other cases that are very volumizing. The only draw back is that some of the very edges of the case are exposed so if dropped your phone might get scratched. Sound Quality It doenst effect sound at all, doesn't block anything. Performance Protects the phone well, also while not causing any damage to the phone from sharp inner edges. Battery Life Doesn't effect batter life in any way its just a case, lol Durability I found it to be very durable. It didn't break or crack when dropped, & holds on to the phone very well. Ease of Use Easy to use & not noticable once on the phone. Just snap it on & its done. Also comes with a screen protecter & that is a plus as you don't have to buy that in addition to the case. Design The design could have been improved if all of the edges were protected, instead it leaves the top & bottom exposed.