One of my favorite racetams.
I usually use oxi or ani during the day. Fasoracetam has been incredible for me to use later in the day when I don't want my sleep disturbed. I haven't tried stacking it yet.
Only used up to 8mg so far sublingual, but it gives me a good 4 hours of calm, yet centered focus and doesn't keep me up at night if I take it early evening.
The effects on gaba receptors seem very real too. This was actually one of the factors that drew my interest to fasoracetam. My use of benzos and ambien have decreased and had a really good phenibut experience a few days after starting fasoracetam.
After getting the 1gm container to trial it, I've been back to purchase the 5gm. This one is a gem to me and I look forward to getting more experience with it.