I've done at least 5 cycles with Deca, three times with other agents and twice alone. I thought it was the most effective for quality size, strength and cuts. An allaround champ that gave me no bloat, quality gains, good vascularity, and ripped when dieting. BUT, I would not use it again. It was the only drug that gave me nut shrinkage and nipple problems (beginning gyno). I suppose I could have upped the nolvadex, and even though the nut shrinkage was temporary I did not like it. I thought Primo was better even though it was weaker, so I mixed it with Andriol. I did not have any side effects from anything else including: Primo, Enanthate, Cyp, Suspension, Prop, Winny, Halo, Anadrol, Dbol, and several others I cant even remember. Only Deca gave me side effects. So given all the other shit out there, I would pass on Deca.