Right, we've moved the chassis into the photo-studio. The chassis is not that big, it measured 45 (L) x 44 (H) x 21 (W) in CM. Let me just state again that the photos really do not do the chassis any justice, you really need to see a build in a computer store or something.
Again the 350D can not fit regular ATX motherboards, you'll need to be on the lookout for Mini-ITX or microATX. But that's getting a very popular format, and even the most high-end processors can fit a handful of Mini-ITX, microATX motherboards these days, with great features as well.
So, the left and right side panels do not have extra little doors/compartments like you have seen on the 900D. The side panels also do not have buttons to open them up, this is done old fashioned way with thumb screws. The left side panel is acrylic see through, it's very large in size and makes your cool hardware look really nice.
So yeah, the 350D is sharing quite a few of the design elements seen on the Obsidian 900. But let's zoom in and have a look at the backside, next page please.