Anyone have experience with Phenibut? Is it just me or is it complete garbage?

I have taken up to 2g and didn’t feel shit. Could be because I also take gabapentin and have a fairly high tolerance to it (1800mg+ a day).

Gabapentin mainly works through the alpha-2-delta calcium channel site, which phenibut can also partly touch, so there is likely some cross-tolerance.

Has anyone else had an underwhelming experience with Phenibut? Any input or tips? Is it just a bad substance with wicked physical withdrawal?