Years ago we thought that cell phones with 5 inch screens are considered too big, but now they sell like hot cakes. Time will tell if the Gigas catches on like that as well.
The chassis is positioned between the usually compact mATX cubes in the market and a standard mid-tower. In terms of volume, the Gigas probably weighs in as a similar number as a normal chassis. This also means that it offers all the usual space and features. One may place large components like a long graphics card, big CPU cooler or full size ATX PSU within the chassis. On top of that, there is plenty of space for storage. The one thing I really missed in the chassis were the water cooling tubes. The two fans in the rear just beg to be used with an externally placed radiator for example, along with proper dust filters to keep dirt out of the interior. So, the Gigas cannot really be sorted within the usual categories. On one hand it is too big to be considered a compact cube. On the other hand it does come across as rather compact. Nonetheless, the chassis does bring a lot to the table and is unique enough to make it interesting.