if you are at 10% or preferably lower. you will get what you want from it. but any higher. don't waist your money. masteron is for when you are already there if you catch my meaning. works best during cutting while on a carb restricted diet. i use it at 150mg ed during my cutter. but someone starting out for the first time on it go with 100 ed.
if you bf is under 9%, you will notice it. I ran it with eq and honestly, I'm around 9-10% at the time, the only thing that I could tell is that it made my muscles even harder than eq. I ran 100mgs every 3 days for 6 weeks. I like it, but it wasn't that great and I can see why only people use it for cutting or contest prep..although, i wouldn't mind running it with primo to see what it could do