I'm looking at the Reactive Pump program and it's 5 days a week. Chest/Shoulders are trained twice a week.
Arms are only trained once directly BUT they are worked also when you do back and chest/shoulders, so they receive plenty of stimulation.
The back and legs are only trained once. Which is not ideal IMHO but the way John trashes legs I'm not sure if I could do them twice per week.
But I'd prefer to add a second back workout that is more pump oriented.