There's no such thing as unbeatable security, not even when dealing superhumans and their homes, vehicles, or other toys. Don't think Apparition is good enough to get at what you're hiding in those oh-so-impressive vaults? She's just waiting for the opprotunity to prove you wrong. Part of being the best is knowing you have prove it. Constantly.
Apparition is a PL 10 thief extraordinaire to add to your Mutants & Masterminds campaign.