The cost of primo compared to EQ just isn't worth it. Been there done that got the tee shirt. Decca will bloat you up and make you think you have more gains then you do. When you come off the Decca you see that right away. Now npp might be different but I haven't given it a chance yet. Maybe next time.
But I have to add all my cycles have test in them and I never run just one thing. Everything goes better with test.
havnt done primo, done deca and on eq now, deca swell was AMAZING, but bad bloat, still love it, eq on week5 now and love it, like deca imo no bloat and nice hardness and veins,