I have been using the backpack for a few weeks now. Actually, if anything all the different zippers took some time to realize there function and purpose. However this more of positive then anything else. I took the bag for a small test. Now it was about 80% loaded with a bit of room to spare. The bag holds all the items well and it feels comfortable on your back. I prefer my packs a bitter tighter then most and adjusted the shoulders straps a bit tighter then how they arrived. The feel and quality of the material is impressive and sturdy. It seems as though it will clean and hold well up to the elements very well. The water proof very front/top zipper/pouch is handy and I tend to store my ipod and electronics here knowing if the bag gets a bit rained on they will be safe. The divider and stuff organizer is practical and straight forward. I have not yet used this to transport my 17 inch laptop but will provide a later update. However I feel the laptop pouch is protective and sturdy enough for my gaming laptop. Overall I have found this bag to be everything and more then what I expected. It has replaced my standard day pack and my gym back with one single bag. Additionally, the build is exception and you can tell thought and time was spent in the construction and design of the bag. All the accessory bags are great for the additional functions they provide and the modular nature is a big plus. My only concern is the rear padding insert that rests against your back. The padding is acceptable however my tends to pop forward and back with much movement. For some this may be a minor irritation for others they might not notice. The resiliency of the however seems to have a double function has allows bending and easier access to the laptop pouch portion of the bag. So this may be a trade off. I give this five out of five stars. Great job you guys! and Gals! I hope to see more products and accessories for this bag created soon!