Let's do some photo's on different angles. I know you want to see it. Mind the aluminum ribbons. It's pretty much a heatspreader design, the case will dissipate heat effectively. Thermaltake calls this aluminum extrusion and it does the job nicely.

Here we look at the left side door. There are four rather long thumbscrews that need to be removed after which two doors will open.

The backside of the casing. If you buy a BTX mainboard in the future it'll fit, but you'll have to order a BTX upgrade package for a small amount of money to replace that backside panel.

On both sides the doors unlock by removing four large thumbnail screws. The doors open up easily and the left side actually will be hydraulicly opened. Furthermore we see six 5.25" bays and one 3,5" floppy bay: you can reach it that floppy by removing the metal mesh (on the left side of the power button).