They make high quality stuff. I have an OP-1 synthesizer. It's not just good looking, it's an amazingly innovative and fun device.
They decided to make the OP-Z out of plastic and it didn't hold up well. It's the fault of their poor design, or at least the type of plastic they decided to use, not the materials.
For something like a PC case, there's already a LOT of options in aesthetics, so asking for nearly $200 for a case (that, as pointed out, you have to assemble yourself!) is a bit much to swallow. $200 gets you basically the highest end case in ANY look that you want. Perhaps not this 'unique', but you have a plethora of options.