No problems with deca, it gives me sense of well-being. So I never saw a reason to try npp. Tren will fuck my head up, I'm not sure if I'll ever use it again. The last few times I did, it was acetate, so it would clear quickly if I ran into trouble. My last run with tren, a few years ago, was prop/tren/adrol all at 100mg per day. I made it 3 weeks...lol. the results were amazing, but my body just couldn't handle it.
Also, tren pellets are attainable if u look hard enough. Learn to make your own, don't make it a 1 day effort, let those pellets soak. I think I went 5 days. This tren is IME far better than from powders.