Great construction. Buy the rain fly. The pack tapers at the bottom. No major concerns, you may have to vary how you pack it, but a clunky 15” laptop and iPad fit in their prescribed areas with sufficient room to carry other items in the main compartment with the cables stowed in the bottom. Side pockets do not work well with holding 32oz vacuum bottles like yeti/hydro flask without impeding the main storage compartment. I’ve taken to storing my water bottle in the main compartment horizontally with more room to spare on top of my lunch box
The pack has a really nice back shape and great straps. The chest straps you can move up and down in a wide range, which is nice for females who need it set higher. The quality of the material was great and not cheap looking, very sturdy.
One thing to note is the color. The black color appears to be a sort of heathered black in the first main photo, but the photo with the person that has the pack on, is a flat black color. I received the flat black color, though I was wanting the heathered black look. I think these might be different year packs, and the color is not differentiated.
The inside color is a bright lime green, it does actually make it easier to see in the pack.
Size, it has a lot of space. The bottom compartment with the extra cord bag is a bit awkward to zip up due to how the material covers the zipper and its at the bottom of the pack, though it is a great space for that stuff. Note the bottom of the pack is more narrow than the top, which is a little odd but while its on the back you don't notice it, just for packing up the bag a little odd to fit stuff in. Nothing that would stop me from using it though
I bought the other two packs in the portal series before the bitstream. The pixel was too small for my school daily carry needs, and the cyber was only marginally larger. The bitstream is the perfect size, and super functional.
Quality is up to osprey par, which is to say excellent.