After 16 years ownership of a Protec trumpet case (which is still in fantastic shape), I purchased this new style cornet case in November 2013.
The quality is outstanding, and the protection offered is superb, with at least 1" of medium-hard sponge/foam to all internal sides covered in a soft fibrous material, the case also has very hard and extremely stiff thin walls (fibre-glass or wood ?) covered in a tough and thick nylon outer material.
My 1920's American long cornet, 15 inch overall length and a few inches taller than a modern trumpet just fits in perfectly (any longer and it would likely not fit). My English short cornet also fits in great, as is, the bell on both of these cornets gets held firmly in a foam slot, but will benefit from my own 2 inch foam block to butt up against the rear shepherd's crook bend on the shorter cornet.
Side pocket will take a straight and plunger mute.
An absolutely great case, and outstanding customer service from Thomann (1 1/2 day courier to the UK, and great packaging) !!!