When I first read the title I was thinking about sims cheating each other lol
Anyway, I personally don't like to cheat when it comes down to money, careers and this kind of thing that have the objective of "accelerating" something you can achieve in the game. Mostly because it makes me get bored so easily, like when I was a kid and I discovered cheats when switching from TS1 to TS2 (TS2 was the game I played less in all my life as a simmer lol).
But I do use MCCC to control the other families in the game, like marriages, careers and pregnancies. I don't play with those families, but I like to stay in control of the sims that are closer to my family.