I got my flip case as part of the deal with my new Samsung S4. For me it is a good average protective case, although it does not specifically protect phone corner edges, which could be an issue in case the phone drops.
It looks nice but it has many design flaws. it doesn't stay closed and it can open inside the bag. That obviously doesn't help protect the screen. the way it's made also doesn't protect the corners of the phone either, and this is how a phone will usually land if dropped. You basically replace the back cover with a slightly more resilient one and you have a flip cover that if closed protects the screen but nothing actually holds it closed. if you plan to really be careful with your phone and you want that case buy it but if you plan to take your phone out of your pocket and actually risk the possibility of a fall, scratch or simple damage from everyday use then that's not a case suitable to protect such an expensive gadget. I am actually surprised with it's price! Thank god I got it for free cause I would be crying for my wasted money right now! (by the way as a tip if you insist on the that case at least get the one with the window. the extra weight of that small window helps the case staying closed)
This case is flat and brilliant for people that want to protect their phone from everyday use, i.e. pockets, handbags. But their are a few design faults. The case gets in the way when taking a photo and occasionally when using the phone in general. There are other products on the market more suitable at a lower cost.