Read this:
http://www.msar.co.uk/pdf/UsersGuideRacingHarness.pdf
Harness mounting bar is far from ideal, it's much too far back, introducing extra elongation in the event of a frontal impact (it would be better to be mounted straight from the main hoop). Plus, as Pauleds states, the design looks like it inhibits harness cross-over as the diagonal intersects the harness bar very widely.
That aspect could have been thought out better given the amount of time/effort that's gone into designing it.
Nice cage otherwise though - I like the front section with the extra legs through the dash and the treatment of the door cross braces looks both neat and effective.