Installation:
When you lift off the porcelain plate from the top of the enclosure you now have access to the tray inside that needs to be lifted out. Three screws hold this tray down so they need to be taken out first before pulling up on the nice material handle to remove the tray from the body. Once this tray is popped out, one SATA drive mounts perfectly in the middle of it. Using hot-swap style of connections you don't need to push any cables on to the drive because it is already connected the minute you push it back far enough in the tray. To secure it, four screws hold it snuggly between four rubber grommets to help reduce vibration noise.

 
(Click to enlarge)
 

Testing:
To test the Na I will run two separate benchmarks on it; one on USB and the other on E-SATA performance. The benchmarks will be done using the HD Tune Pro software.

Testing System:
CPU: Intel Core2Quad Q6600 2.4ghz @ Stock Speeds
Motherboard: Asus P5K-E WIFI-AP
Memory: 4x1gb Patriot Extreme Performance DDR2 800mhz (4-4-4-12)
HDD: Western Digital 500GB SATAII
DVD+/-RW: Pioneer DVD-R212
Video: Asus 8800GT 1GB
Sound: MOTU 8PRE Firewire Audio Interface
Power Supply: Seasonic S12II 500W
OS: Microsoft Windows Vista Ultimate Edition x64

USB Performance:

E-SATA Performance:

When the fan came on to cool the drive it was audible but I was pleased to find out it was a very quiet and pleasing sound. I've reviewed some fan-cooled hard drive enclosures in the past that have a very loud and noticable whine to them, so the Na enclosure gets two thumbs up for excellent active cooling performance.