I've tried a bunch of these waterproof cases and here's how I rank them. I have also included the pros and cons from my actual time owning and using the cases :
1. Incipio Atlas
Pros: Not that bulky, glass screen protector, no pillow effect, responsive buttons, 1-year phone/case replacement in case of accidental water damage, touch sensitivity and accuracy not affected
Cons: Not a lot of grip (slippery like a Otterbox Commuter), earpiece volume slightly soft, speaker volume slightly muffled, difficult to take case apart when wanting to remove phone from case, lack of additional accessories available for purchase
2. Otterbox Armor
Pros: Solid build, clear earpiece audio, speaker audio clear, screen protected with similar protector as Otterbox Defender (slight pillow effect), easy to remove phone from case, slot for a lanyard or wrist strap, great customer service from Otterbox, holster available for purchase
Cons: Bulky, heavy, screen prone to minor scratches (just like the Otterbox Defender), port covers may be difficult for some to remove
3. Lifeproof Fre
Pros: Not bulky, light, responsive buttons, separate port covers for headphone and lightning connector, additional accessories available for purchase, lanyard or wrist strap slot, slightly more grip than Incipio Atlas, easy to remove phone from case, 1-year phone/case replacement in case of accidental water damage, replacement o-rings can be purchased directly from LifeProof
Cons: Screen protector isn't the greatest, pillow effect, touchscreen sensitivity is s what compromised, muffled audio from speaker, many revisions of the case means there is no guarantee that you will get the latest version at your local retail store or online store, earpiece clarity slightly compromised, o-ring wears out after multiple times of installing and uninstalling phone for case
4. Seidio OBEX
Pros: Extremely light, easy to remove phone from case, touch sensitivity not compromised, no pillow effect on screen due to dots on inside of screen protector, audio is perfectly clear on earpiece and speakerphone, holster available for purchase
Cons: Not a good case to take phone to take in and out of case periodically (may be limited to less than a handful of times removing phone from case), dots from screen protector fall off after a certain amount of time (which means oil slicks will happen), very flimsy mute button cover, not the most durable case due to it being very thin
**I haven't tried Griffin's new case or the Lifeproof Nuud. I'll give the Nuud case a try whenever my Atlas case needs to be replaced (from normal wear and tear).