^ DD has a great response here
two points that stand out:
#1 - duration is rather short, and this is a compound that will really require longer use than 20 days..
the dosing amount is fine
#2 - I personally would not recommend the pulsing method of dosing that your friend speaks of
(ie not dosing on non-workout days)
similar to the duration of use needed to get ample and quality results, you also need to keep blood levels raised continuously and evenly, and not have compound penetration be randomly up & down
thanks for your question, and welcome to AM