Excellent case
Very good quality case. I already had a Define R5, but this one differs in that it's a little more compact, and there's no 5"25 slot or front door. Other than that, you get thick, solid steel and all the benefits of the brand, such as top cable routing for cable management, hand screws all over the place, dust filters and customisation to suit everyone's needs. The front panel is made of brushed aluminium with a black tint, which is both attractive and sober.
The cage for 3.5" hard disks is a little tight (2 slots), but these days between SDD and NVMe, traditional hard disks are less common.
Beware that the case is not very wide, the be quiet! Dark Rock Pro 5 is just 1mm wide. Be sure to check the size of fans and graphics cards accepted in the product description.