The sleeves are not a problem, just don't put cables, flashdrives, mice, whatever else in the sleeve with it. A new laptop in the box is dependent on how it's packaged. If the laptop is clearly visible, not an issue. If it has cables and other things sitting on top of it, it has to come out. Unfortuately the only way to know is to run it through and see how it looks. When I get new ones in the box through the machine, maybe 10% of the time they have to be taken out. For 2 laptops, 1 in each tray. Two stacked on top of each other don't give a clear enough view.