Taking a closer look at the window mounting reveals a single piece is surface mounted using a clip system.  The clear, sleeve bearing 120mm fans are NZXT branded and can be controlled with a three pin lead or using the 12V pass through.  This same control scheme is used on all three of the 921's 120mm fans.

The Guardian 921 features ports for two USB 2.0 devices, HD compatible audio I/O ports and a single E-SATA port.  I couldn't be happier to see the E_SATA ports edging out the seldom used firewire ports around the lab.

The inside layout takes a more traditional layout.  The steel case does have a solid feel with its 8.20 Kg (~18 lbs) weight.  As with all NZXT cases the cage offers rounded edges and is cut for ventilation.  The front panel runs seen here are long enough for most motherboards but  I did find the HD audio out a tight fit on the ASUS board forcing me to run it across the PCI slots to reach.  Everything else fit mostly out of the way with minimal cable ties.

Looking towards the front you can see the cage supports three 5.25 drives and five 3.5" drives (including two external bays).  The top two bays are blocked by the temperature monitor assembly.  The temperature probes and power for the display are managed at the top with the rest of the leads coming out behind the drive cage.

The back provides a closer look at the only black 120mm fan.  Sharp eyes may spot the screwless slot spacers.  I have never been a fan of mounting my expensive and often heavy video cards with these clips but my Sapphire 4870 seems to be held in place tightly.  The addition of these clips makes the 921 design nearly tool-less.