Well the S3 arrived and I've had some component issues so not used it in anger.
Initial thoughts:
Big! (For an ITX)
Well built, although paint scratches easily.
No dust filters, for a case this expensive, it should really come with them. I ordered a set of demciflex filters specifically for the case, however on arrival I've been given the wrong colour, I decided to use them anyway. What I didn't immediately realise was the case is made of aluminium and as such, the filters won't stick on with the magnetic frame. You have to stick them on using the stick on border and it looks absolutely shate.
I used the European distribution shop and whilst all ok, they've given me the more expensive vented+windowed side doors, I didn't actually want these, I wanted solid+windowed so I emailed them and never received a reply.
Cable management isn't great on it, well I don't think so and overall, I can't say it's worth the price I paid. (£530 in VAT and deliver) + £50 for the filters.
Still, I've experienced it, don't get me wrong, it's a very nice case, but as others have mentioned, not worth the price.
There's other niggles, but suffice to say I will keep the case forever, and will one day re-visit it, but I've decided to go back to ATX and a new Phanteks Evolv in black.