where to start. It has ZERO ventilation, it only has spacers for the front and back of the hard drive. The top and bottom and both sides can freely touch the case, but this does not prevent the hard drives from rocking relative to the top and bottom directly. Keep the disc steady, but not long enough to store and move it. As for the sliding lid, it's unnecessarily difficult to open and close, and when closed, one of the two corners on the SATA side always seems to want to stick out of the rail. The only way to connect or remove a hard drive is to press firmly on the hard drive to lift the data connector and circuit board. The biggest design flaw. Finally, there are no feet on the case to prevent slipping, just two very separate strips of glazed plastic that are more cosmetic than functional.