70 % Rule or MPP

[Toshia Booker-Blakeley]

I am wondering how these 2 favor for new & seasoned investors. I personally like the MPP calculations because it seems as if you are allotting for  majority cost involved in a flip.... repairs, profit, holding & closing cost. However, I hear a lot of advice for new investors to use the .70% rule. 

I'm just curious to know which others are using and how it has worked for them. 

- Thanks

Toshia