Here are pics of the Supcase. It's a bit on the rugged side and offers water resistance (not waterproof). It looks like a cross between the Otterbox Defender and Spigen Slim Armor. Even though it's not slim, I don't consider it to be bulky and it looks like it will offer some solid drop protection.
I removed the section of the built-in screen protector over the display since I have a screen protector installed. There's still a portion of the protector around the front camera and earpiece area. It also has plastic covers over the back camera, laser auto-focus, and led flash. A thin layer of mesh also covers the mics and IR blaster. The earpiece and back speaker are covered too, but audio doesn't appear to be affected. The port covers work fine for my plastic-backed G4, but there have been some Amazon reviewers stating their port covers don't fully close with the leather-backed G4. Additionally, the rear buttons are covered, but remain easy to press.
Here's an imgur link to the Supcase album in case I add more pics not posted here:
LG G4 Supcase