Advantage on sleight of hand, including lockpicking and disarming traps is a powerful advantage to have.
My current playthrough, I've cranked up Astarion's dex and dex boosting items, so with various bonuses his lockpick/disarm is already +13.. Then tack on Advantage. Never get a Crit fail, with a good stockpile of thieves' tools, no lock in Faerun is safe!
