It's just a lil more slower then tren e, but I notice it's a bit less harher on side effects weither it be because it's released a bit slower and ur not getting whacked all at once like say a tren ace.... Iv use all ester trens and for whatever reason I always felt the best using tren hex/parabolan. I use to use Balkans parabolan alot and alpha pharmas once. Balkans deff was the better of the two but alpha pharmas wasn't bad, just preferred Balkans parabolan.... Actually used it last summer was prob the best I ever looked. I'm planning to add a small amount of Stan's tren hex to my primo cycle but small dosage only like 100-200mg max. Really gunna try and achieve what I want with primo dieting and training. But tren is something else called the nectar of gods for a reason