Great feature, slide in your optical drives, push the retention clip and bam .. the device is secure. Really easy, really effective an no screws or tool required at all.

Slightly out of focus, but the HDD is secured with two plastic retention clips, simply slide the HDD into the drive-back, and once you hear "pop" you can stop as it's secure. Within a second you can pull it out if you wanted to.

All the way at the top we have now removed the cover. Here you can access and see the actual water-cooling. All the way to your left you can see the radiator, covered by two fans. This is where heat dissipates.

When we move the camera position a little we can clearly see the water-reservoir with a funnel on top of it to fill it.