I can't see a cross strap on that, so I suspect it'd be irritating on the bike. The better bags (anything you'd want to consider buying, basically) have a second strap that doesn't take any load, but stops the bag sliding about on your back.
@Steff started
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I can't see a cross strap on that, so I suspect it'd be irritating on the bike. The better bags (anything you'd want to consider buying, basically) have a second strap that doesn't take any load, but stops the bag sliding about on your back.