I got this bag in order to carry my laptop, accessories and documents every day, but I wanted a bag that would both roll and be a good backpack, and this was the only one I found that remotely fit the bill. It's a good idea in theory, but in practise, it does not quite work. The straps take too much time to pack away, and until they are stowed, they'll drag on the ground if you try to roll it. Better that the straps were on one side and the wheels on the other. The way it is, I leave the straps out most of the time, and pack it everywhere. The chest and especially the waist straps are essential when carrying up to 10kg of laptop and other kit. Then, the bag is supposed to stand upright, but when loaded, it tips forward. I know that the size of the frame is limited to make it carry-on size, but a foldable stand would go a long, long way toward improving this bag. It is advertised as having a 15" laptop sleeve, and while my old 15.6" laptop fit just fine, my new 15.6" laptop is a bit wider, meaning that while it does fit - just - it is quite difficult to get the zip to go over the top corners, which are uncomfortably close to the world that the bag is supposed to protect the laptop from. Also, while traveling, I often get my laptop out and put it on top of the bag while the bag is on my lap so that I can use it. However, the fabric of the bag is quite slippery, and the laptop is all too prone to slip off unless I hold it constantly. What it needs is panels of a more grippy fabric on top so that the laptop won't slide so easily. The detachable daypack is a bit pointless. I never detach it, since it has the laptop sleeve, and it only seems to reduce the bag's total capacity. Yes, I could detach it and carry the two parts front and back, but it takes too long for a daily commute, as there are all sorts of clips to be manipulated to get the whole rig on or off, and it takes long enough to undo the chest and waist straps with the daypack on the back as it is.