Pros and cons of using both sides of force(Star wars)

[Zombie Swarms]

I mean, what would be pros and cons if i used both light and dark side of the force? Would it be harder, because you need learn both ways, not just one? It would be nice to heard your opinion. I mean, what is pros and cons of being gray jedi.

[Cosumar]

CONS: It is incredibly difficult to balance both sides of the force. It takes tremendous willpower to be a true Grey Jedi and remain one. Constantly checking yourself to make sure you don't swing too far in either direction would be a huge burden. You also wouldn't truly master either the light side or the dark side while balancing both, limiting your overall potential for power.

PROS: On the other hand, you'd have a more complete knowledge of the force due to firsthand experience using it in more ways than either a traditional Jedi or a traditional Sith would. You would also be unobstructed by the rigid codes and rules of both the sith and the jedi, free to pursue a life with both peace AND passion.

[Altmoras]

I don't have many cons I can think of, but being on the razor's edge between the two was what made Mace Windu so strong so that's a pro.