The doors of the Cosmos II are likely my favorite design features of the case, both aesthetically and functionally. They're made of large panels of brushed aluminum, one of my favorite materials. Ontop of that, Coolermaster has worked a clean curve into the panel, and added some edgy geometry, creating an exposed grill-like pattern which is complimented by some fine plastic inserts. It really looks fantastic, and once again doesn't deviate from the overall theme of the case.
The rear panel of the Cosmos II may be the most standard areas in its design, but then again there's only so much you can do when you're designing for a highly-standardized set of design rules, but Coolermaster still does everything it can here. It's equipped with a 140mm fan, where 120mm fans are the norm. Another difference is in the protrusion where the power supply sits, in that it actually sticks out from the rear of the case a bit. Coolermaster has again surprised us with creative design that really works. The bracket is removed by taking out the thumb screws, attaching the bracket onto the power supply, then sliding the whole assembly into the case. It appears at first as though this only leads to added steps and more work, but since the bracket fits in cleanly, and it fits over the power supply nicely, the annoying alignment issues are essentially eliminated. The latches for the doors are also located on the back; simply push down on the tabs and the door pops cleanly open. It works great, is very smooth, and has felt quite durable through our tests.
The bottom of the case has handles similar to the top which raise the bottom of the case off the floor (or desk), which helps prevent uptake of dust and also improves airflow from the bottom. The rails have fairly large rubber pads which provide nice grip, even on hardwood floors, and prevent scratching of both the surface it's sitting on, as well as the case itself. The bottom PSU fan intake is also filtered, and slides out easily with the pull of the tab seen on the right for quick and easy cleaning.