I have had a terrific experience with Volkls
I have this one and my son (who is 13) has the same one in Black and Grey (now on sale)
Liam, in particular, is very hard on bags (and everything else!) and it hasn't missed a beat despite being carried on bikes, buses, planes and heaven knows what while being thrown about and packed with stuff.
good design but BRILLIANT quality, zips, seams etc. VERY tough
so, gets my vote.