I have actually stacked all three options. I would say as far as for me I liked the Sustanon and Primo stack. But some gain more water than others. If your diet is pretty strict and your H20 is about a gallon and a half day Sustanon and Primo is what you would get the best results from. But Primo and EQ I have used before and had more of a quality lean gain but I stayed cut with less mass than with the Sustanon stack. I kinda feel primo works like a mild Deca for me. When I ran Deca and Primo together it was more of a lubricating gain and some strength gain. hope that helped.