ebon smelt
It's felt to me like a rachet, where i've been suprised how much of my gains stick over time. But then i've heard from others that it feels to them that their aim falls off significantly. So i guess your milage may vary?
to me it's felt like there's some day to day variability, some days i'm on it, alert, focused, aim hot. Other days sleepy and slow. But that aim training has improved that range overall, the top and the bottom both got higher, and I don't feel like i lose much of that improvement even after months