Internals
Inside the Black Widow is the same as most other Cooler Master cases. It has a removable motherboard tray held in place by 4 thumbscrews enabling you to quickly remove the motherboard, CPU and cards. There is also thumbscrews on the PCI expansion slots. Installing the PSU is extremely easy too. Cooler Master supply a plate which you screw to the back of your PSU to allow the PSU to be installed/uninstalled without disturbing any other hardware inside the case. This plate is then screwed to the chassis of the case safely securing the PSU. Also the case is designed for different length PSU's and installation of dual fan PSU's is not a problem.
The case also has plenty of space for 3½ inch devices with cooling from the 2 intake fans. There is also space for 4 x 5¼ inch devices, but if you are wanting to Stealth your CD drives there is 1 face plate missing. There are a few online retailers selling Cooler Master face plates but unfortunately I don't know of any selling black Cooler Master face plates.
