I thought I would never do tren again but I added about 150 mg a week to my stack and am amazed at the almost no existing of sides. Hardness is amazing and I can still breath good. sweat like a pig tho but that is about it. Strength is moderate unlike at 400 mg, also weight gain isn't huge. I think low dose is good and pretty safe, everything else is risky. Only my opinion but I think long term high dosing is not good.