Very thin shell at the rear like the flap in the front. This helps protect the huge window of note3 against the keys and other stuff lying around in his pocket. The whole is barely thicker than the bare phone. The black color and stylish "leather" look great. Frankly that's good.
To see the behavior in time ??? ;-)
Update: 6 months later, the protection is still OK. The edges actually wear out a bit but ... it's still okay (1 star less anyway)