I bought the Preserver after having to replace the screen on my Galaxy S4 when it was knocked off the kitchen counter an landed face first on a tile floor. I am very pleased with the impact protection and since I am frequently on the water with my boat, the waterproof characteristics are great. There are three useability issues I have: 1. The protection afforded by the extra layer of glass reduces screen readability in sunlight. The screen is almost impossible to read unless it is shielded from the sun. 2. The buttons take much more pressure to use through the case. 3. It is difficult to swipe down from the top of the screen to get the settings menu due to the raised lip on the case adjacent to the glass.
Pros: High quality, Durable, waterproof, good impct resistance
Cons: screen readability diminished, buttons require lots of pressure