I think it's personal response man, you never know how you'd respond as an individual until you try it. I've bulked successfully on 100mg Tren ED, TRT dose of Test and some Mast in the mix. I gained about a pound to a pound and a half while staying relatively lean. Of course it's not as 'fast' as blasting Deca or high doses of Test but a lot of the weight you gain on those would probably be water which you'd end up losing within the first few weeks of your cut anyway. Tren just gives a really good quality look and I don't have to spend as much time dieting down; it really is super versatile.