I have been using Viper's NPP and I have to say this is probably the biggest I've been. I think I am just one of those guys that respond well to it, idk how I will respond to other 19-nors like tren, but I might give it a shot.
I always look like I have a little pump, and I don't know how much of it is NPP but I am always pretty vascular in my arms.
Strength gains? Yes.
Before this I did a cycle of Primo from goodlyfe and when I started I had already been on TRT for a while, but I had soft ass water weight of like 188lbs to 190lbs @ 5'10, on that Primo I cut all the way down to 168lbs. I was shredded, but by that time I was on 450 test c/400 primo e and they were both eating my hairline.
I took a break, let my hair stabilize and even recover a little. Then I needed some new Test, so I ordered some from Viper, but there was a small delay/miscommunication and so he rewarded me as a first time buyer with a free NPP and Tbol. I used the Tbol as a starter. It was fantastic, no effect on my hair and I feel like it got me in shape enough to be able to quickly adapt to my new job that is very physical, also in shape enough to really enjoy and push with the NPP. I have been taking a little baby dose of NPP at 100mg/week with no effect on my hair and a ton of benefits. I think I have become a big fan of NPP now and I will probably end up trying to find my max dose, then take a break and come back with a serious cycle for my next run of NPP.
EDIT: Oh I forgot to mention the weight. I am now back up to like 184lbs. I know some of this has to be trash weight, but I honestly still look pretty cut at this weight, so I am happy.