The main strength of the fruit is the fact that it will give the consumer good luck during any situation. If they are going to be harmed in some way, they can avoid damage and can score ace hits on anything when in a fight themselves, even with a weapon they have never used before in their life.
The weaknesses of the fruit come at a dangerous price to those that are around the consumer and the consumer itself. If the consumer experiences their good fortune and anyone is within close proximity to them, they will experience the bad luck that was intended for the consumer.
Another weakness comes in the sense that it is not explicitly stated that the user is invincible. For example, if they were to take a fatal wound from an enemy, they would still take damage by getting hit elsewhere. It only guarantees that they get lucky enough to not sustain a hit that will kill them, but not that they will not sustain damage altogether.