3D Game Man posted a review on the iStarUSA D-300L-M6 Rackmount Case

Improvements over standard 3U design include dual "two to three" hot swappable SATA bays and modular internal fans. This is truly holds fast to the theory that a server needs to be redundant. The option for various colors for doors make a wonderful choice for server rooms that would like to easily differentiate between servers by color, instead of looking for small labels on the face of the machines. This can also become a very useful tool for any business that has their servers in a window display.

iStarUSA D-300L-M6 Rackmount Case Review