In search of a backpack to carry my PC (HP branded with the previous released after 3 months), I have long hesitated and finally I fell for this model. The bag is designed for 17-inch and use a Samsung 15 inches. I fear that the PC does ballad and there ... surprise, the internal security of the retention strap perfectly! so it meets my needs perfectly knowing that I carry every day: my laptop, a workbook (called Federal Switzerland - 7cm), a record of approx. 4cm thick, plus all accessories (PC charger kit with pens, external hard drive ...). Filled he does his weight but the straps are comfortable and sturdy. No complaints either about the quality of materials or seams. A true Swiss quality product that has only one drawback: being more expensive in Switzerland and étranger..mais that ... that's another debate.