The positives: Lightweight and simple bag for carrying a laptop with thin protection. Very comfortable space for 15.6" and probably fits a 16" as well. It is noticeably larger than the iBox TN6020 and may not be convenient in some usage cases, e.g., transport with a motorcycle.
The negatives: The strap is not removable as it is sewn on one side. This means that if it breaks, the bag is for throwing away. Also, one additional external pocket with a zipper opens and closes vertically, so it doesn't offer much security, as if left open, something like a power supply or mouse or power cable could fall out. Of course, the very low purchase price is just fine for what it offers.