I bought this for my son, who cycles to school with an incredible amount of kit. This holds it all securely in a very flexible layout. Most importantly, it is a very high-quality product that will hopefully stand up to the rigours of school. The zips are chunky and well sewn, the stitching throughout is very well done, and the finishing is excellent too.
The straps, whilst well designed, lack a chest-level crosspiece which my son claims is not an issue but is something I prefer. The bag is so well designed though that such a strap can be fitted with no fiddling and therefore I do not regard this as a fault in any way.
The compartments are well though out and spacious, and the bag folds flat quite neatly as well. The bag is covered in Molle loops, so just about anything sensible can be attached.
All in all, this is a very rugged piece of equipment and will stand up to a lot of usage and a thorough battering.
I highly recommend this piece of equipment.