I think Fractal got it right with the design of the tempered glass side panel. The way they got metal to contact the glass panel with adhesive yet not show on the business end would be something of an industry first.
The price tag would be a downer since the case could appeal to air cooling folks or those who'd want to show off their home servers/NAS. On the flip side, the attention to detail and how it's pretty well geared to the watercooling crowd for custom level cooling puts it right up top for cases that need no modding at all to drop in large radiators, push/pull setups and yet hunker down with storage options.
Nice write up nonetheless
P.S: There's a video by Bill Owen from MNPCtech showcasing teh R6 and it's got some nice touches hence my mention of the attention to detail by Fractal.