As of its release, this is probably the most straightforward and effective damage healing in the game, ahead of Earthly Serenity. Basically does what an entire First Aid would do, in one action with no resources, at the cost of temporarily dropping a clue you probably picked up with action compression (Deduction, Fingerprint Kit, Trish) anyway.
Being flexible enough to patch up a Beat Cop, Grete or Bystander is a plus.