I purcahsed this bag to carry my 18" workstation. After viewing other messenger bags that state they hold an 18" laptop I compared dimensions with this product even though for this product it only states 17.3. My workstation measures diagonally 19". A concern for me was padding and durability considering my workstation is very expensive.Construction: 8.5/10 - Considering the cost of this product the leather material is as expected. The shoulder strap is leather with a cotton/linen strap sewn. I would have liked to see a full leather strap. Evenly spaced stitching. Padded compartment for laptop.Durability: 9/10 - This maybe updated in the future. This bag has good stitching, metal zippers, the pocket flaps are thick. This leather is soft and will scratch but it should not affect the performance of the bag, if anything its free added character. I do expect some brown dye/polish to rub off over time.Useability: 10/10 - This is a well throughout design. The center pocket is the laptop area is perfect, there are two other large pockets on either size of the laptop for pens, business cards, usb drives, tablet and or paperback notebooks / business drawings (blueprints). Four front pockets of various size that perfectly seat the workstation charger, mouse, phone charing accessories and earbuds.