It is ultra-thin, but protects the sides and back perfect, down and up is open, however, should be aware of any potential buyers.
By matt surface it is extremely comfortable to hold.
I use a real-glass screen protector (you can also get here on Amazon), which also fits perfectly with this Case.
Moreover Krussel grants of registering the envelope lifetime warranty (30 years), you must register the wrapper here:
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Have fun with the all-round successful Krussel Case.