don't buy if you are 5'8" or under.  The back does not adjust and you end up with the cross point on the back of your neck.
if you are over 170cm or if you are willing to take it apart and resew the cross point, it works well.  I have to go through a metal detector every day at work, and this is much better than my normal belt or suspenders.  it just took a little work to get it there.