This is a no brainer. If you don`t want to die then stay away from PADI. When you`re first learning you need to learn properly not quickly so take SSI courses instead they are longer and it takes more time to get certified which is a GOOD thing. Take it from someone who became PADI certified - too soon, too fast - and almost drown as a result. However, bottom line is the instructor but then again, nothing beats time and practice, both of which PADI doesn`t give you to get certified.