I started using it (0.5mg-0.9mg eyeball it before sleep), and somehow woke up much more during the nights consistently, but also somehow woke up more rested/felt better. This is actually the most common anecdotal report, that people feel better the second day, not that it fixed their schedule or that they feel better sleeping, it might just be placebo though so take my word with salt.
Here's the thing though, its INCREDIBLY inconsistent, in studies, in practice, everywhere, and for me, not only can it have different effect curves and different effects in different people but the effects can differ at the same dose, and same person, just a different night.
The only 2 consistent stuff are: the higher the dose the higher chance of side effects such as paradoxical wakefulness etc. but the side effects are rare and not many people experience them(also the effects and side effects likely only lasts for like a few hours, so it wont give you day long problems), and also the more "stressed" you are/lack sleep, the more actual chance it works for you, so that's a good thing kinda.
Most of the time its a gamble between no effect and effects, but sometimes, yes side effects can surface in my experience.
Did it help me? Somewhat, I would say its overated but also good enough to use if you have sleep quality issues. And yes I'll keep using it but I only have been on it for a week, so just one vial out of 10. I'll prolly up the dose to like 1mg-1.2mg for the next vial and see how it works.
I am now looking into epitalon , it seems much more consistent from what I can see on the surface but haven't looked deep into it.
Oh and also we don't even know how it acts in the body at all, reta has clear mechanism on 3 different hormones, this thing has like no data at all, no well-established receptor and no clean, reproducible mechanism, we can onyl speculate the area/system it might affect, such as stress axis, sleep related brain regions etc. Its a mystery drug.