Although I trust Mt. Gox, I personally feel like the way that BitBills and Causcious Bitcoins are going is the better way to go. If one day I can no longer trust Mt. Gox, my BitBills are still safe.
Say Mt. Gox gets hacked, my redemption codes are now worthless, my BitBills are not. There is more trust in the dual hologram system than redemption codes, not because Mt. Gox is untrustworthy, but just because of how the system is designed.