Which Mass Core should I choose?

This is a general breakdown of what to expect from the Mass Core, from monkii Danimus himself:

I hereby declare the Masscore instructions/progression as the following:
Level 2: Beginner
Level 3-4: Intermediate
Level 5: Advanced

A beginner can use level 2 for any program (Cardio, Core, Hybrid). The same would be true for an Intermediate and Advanced user. The Level 5/Tactical Masscore can be used with all the programs for the Advanced/Insane user.