Great pick. I had trouble finding a bag to fit my 18.4" laptop, and I found this one. Of course, it's very expensive, but it comes with about 10 thousand different compartments and pockets, with different structures. The laptop protective pocket opens completely, 180 degrees, and the material quality feels and seems great and durable. It seems gigantic, but it's highly adjustable and feels very nice when carried. Wouldn't recommend for clothing and general purposes, it's certainly for tech or student related purposes, like carrying your laptop and your different peripherals, your books, projects etc. It excels on that note, but be sure to pick it for the correct usage. Also, be sure to register the product on their website for their lifetime warranty. They even have quick and accurate customer service. A niche but worthy product!

I have it for 1 year now and it is brand new. Quality-wise, words are unnecessary, thick zippers, soft fur lining for laptop, tablet, and mobile positions. Thick and sturdy protection for computer positions. Very good durable seams. There is nothing that doesn't fit. There is a place for everything. You throw in the keyboard and it literally disappears. If you don't see it, you won't believe it. Of course, the laptop position can fit a laptop larger than 18.4''. I have put in MSI GS73VR 7RF Stealth Pro & Predator Helios 300, both with a 17.3" screen, but they didn't even reach the height of the pillow, there was 1.5 palm space above. There are many pockets, most of them with mesh. It has 23 internal compartments along with pen compartments (4) without the positions for laptop, tablet, mobile, and the external one shown in the photo and is open. It has an elastic band to hold a large bottle in the side position. It comfortably fits two laptops and two tablets only in the two positions. It has clips to gather. It is a storage bag. Also, if you carry it with both handles on your back, you don't feel the weight and it doesn't tire you. In contrast to filling it and wearing it on one shoulder, it is unbearable. The disadvantages are the front pocket which is useless, mainly because it is open and easily accessible. I consider its function to be for quick access to items that you don't care if they are stolen. It has a safety zipper only in the laptop position at the back. Don't get it if you don't have many things to put in. Because it will be empty and sag in front. It is a bag that can easily fit all computer items and travel items.

Monster bag for laptop and more.
Quite large in size with multiple compartments that can also be used for clothes on a short trip.
Very good construction and quality.

Finally, I found a bag that can hold my 17.3-inch ASUS laptop... it fits perfectly and there's even extra space... incredible compartments inside to fit all my belongings... I am completely satisfied... I have put many bulky items inside, such as a JBL speaker, all the laptop accessories, and I also fit their boxes...
As for waterproofing, it has an extra rubberized hood inside. You put it on the outside.