I have the Folio Case.
Good points - It fits VERY snugly, almost too snugly (its very difficult to get out). Previous case I have had for other phones without a very snug fit have allowed sand to get behind the phone scratching the aluminium.
The leather is lovely, has a great treated leather smell
The case naturally closes over the screen, but this could change, I'm always a bit suspicious of Folio cases that cant lock closed as it provides less protection if it flings open during a drop
The plastic protrudes slightly above the profile of the phone front, hopefully protecting it during a drop.
Bad points -
The leather stitching started to pull on mine after a week. Google immediately offered a refund with no need to return as soon as I complained however.
When flipped open during a call, the rear mic picks up tones of noise and this causes the volume of your voice to drop in a call this is very very annoying