The interior is quite roomy, with a number of features worthy of mention.
Firstly, the motherboard mounting tray is removable. Yay! There aren't enough of these in the world - I've certainly skinned my knuckles a few times trying to slide a motherboard into the right position, and dropped screws down the side which conveniently roll underneath the board. Being able to remove the tray lets you mount the board securely and effectively. This particular tray is secured to the chassis via a single screw in the back panel. You can add another screw if you wish - there's the facility to do so.
Positioned over the PCI slots is a mounting bracket with thumb-release sliding tabs which slide down over the card riser and fix it into place. The idea here is that you can install any expansion card without needing to secure it into place with screws (part of the whole screwless design concept). It has been noted in other cases which use this mechanism that tall graphics cards which extend beyond the height of the riser can actually prevent the holder from fitting properly over the top of the riser. We tested this unit with such a card, and didn't notice the problem in this instance.
You still can secure any cards with screws, but this requires wholesale removal of the tab mechanism via three screws through the back panel.
The cover for the output array on the motherboard is affixed to the case via screws, rather than the usual push-it-into-place-and-pray-it-doesn't-pop-out arrangement. It also doesn't feature those annoying little tabs which press down on the USB and PS2 ports featured by most covers. The only downside is that this method of attaching the cover to the case isn't widely supported, and any motherboard you buy is likely to have the standard cover, and if the one supplied with the case doesn't fit your needs, you'll have to turf it in favour of the older style.
The mounting bays all utilise a slide-and-release catch, which secures any unit by placing a metal pin into the front screw holes on either side of the device. There's plenty of tension in these catches so they're pretty secure, but there's still the option to use the rear screw holes.
There are three 3.5" hard drive bays in the internal HDD enclosure, and these face out the left side of the panel rather than the traditional configuration of front-to-back. This does make installing the drives exceptionally easy (again, no skinned knuckles!), but this does take the power and PATA/SATA connectors on the back of the drives further away from the motherboard. Make sure your cables are long enough. Directly in between the drives and the front panel is another 12cm fan. This helps extract heat away from the drives, especially given that the side vents are positioned exactly at the level of the enclosure, but the drive configuration does mean that airflow is hampered somewhat, and that the drives are more reliant on cross-airflow from side-to-side rather than powered airflow from the fan.