The first thing you will notice on the side of the Swirl is the huge vent cover for the 120mm fan. Please excuse the lack of contrast in the picture; the case's mat finish wreaks havoc with my cameras focus.
The back of the case is pretty self-explanatory. The back vent is capable of accommodating a 80mm / 92mm or 120mm fan. The astute among you will probably notice that it has a 92mm fan installed out of the box.
As you can see the front audio and USB ports are tucked behind a flap at the bottom of the case. Being someone who likes my machine on the floor I dislike this arrangement, I would prefer they be at the top or at least central. This arrangement allows very little maneuvering room when connecting devices. Not a huge deal but it could do with some thought. You can also see the touch sensitive power button.
Now, on to one of my favorite features of the Swirl. The vent has two settings, open and closed. To change between the two all you need to do is push the silver button in the center. The button also turns off the 120mm fan when in the closed position. This means that the 92mm extractor fan does not pull air from the side when the side fan is off and instead draws its air from the vents in the front of the case. This makes for better cooling than simply having an off switch for the side fan. A very neat feature for those wanting a quiet case but still requiring decent cooling whilst gaming etc.