Primobolan is as mild of a steroid as is made. It is highly anabolic and almost completely void of any androgenic properties. Sides are mainly DHT related such as MPB and prostate irritation. It won't lead to any drastic alterations in your physique, but is good at maintaining muscle mass in a hypocaloric state. Good for the ladies involved in this game as virilization is rare. It doesn't really aromitize so it won't cause edema. The drug is attached to the enanthate ester so it has a relatively long half life. It would be fine with deca, but I'd be concerned about sides related to deca...prgesterone induced side effects. For the Primo as it is so mild 400mg is about the minimum to get anything from it. Not an ideal drug if you're looking to add mass. There are more cost effective drugs out there. I personally am not a fan of it, but then again I'm not in this game for the "mens health" look.