How well would an incredibly limited healing ability go over?

For limitations, I thought of:
-They cannot heal themselves (after all, the only way they could see themselves is a mirror and well... that's not them.)
-The healing ability cannot heal inorganic substances (so no fixing things like Crazy Diamond from JoJo's or something.)
-They have to see the wound/damage on a person that they wish to heal; it cannot help things like internal bleeding or anything that cannot be seen.
-Of course, the daily limit would be a limitation.

If it seems too OP or not that helpful though, I can definitely come up with something else.