This is one of those game changing cards that makes me feel that Ms. Marvel is the first expansion pack you should get. This becomes one of the main powerup cards I consider whether each character should take, alongside Avengers Mansion and Helicarrier. Any character who feels like they don't have enough recovery can take this card and be vastly improved. Even if you do have enough recovery, this is great as it gives you even more recovery. You only have to use the recovery bonus twice to feel that you really got your money’s worth out of it, and even using it once is just as efficient as many other healing effects such as using First Aid on yourself.
Of course, not every deck will benefit from this card. It is meant for decks that regularly take damage and need to take recover actions to heal from it. Some decks dislike their alter ego form and do everything possible to stay in hero form, where they won't benefit from this card. Also, I tend to avoid giving this card to characters who already have a very high recovery compared to their hit points, such as Ms. Marvel herself, as I don't want to wait until her hit points are almost gone before taking a recovery.