I took this backpack on a 14-day school trip through China and it was all I needed.  I took the advice to pack thoughtfully and there was more than enough room for all my gear.  The top-loading feature is like having a regular suitcase, and the security straps across the top prevents anyone from opening up your pack while wearing it.  I now use this for all of my travels, even the shorter trips.  A truly quality product.