I take it primarily for it's strong anxiolytic effects and now use it "as needed" as it can be taken and felt within 45-60 min. It is, IMO, the strongest anxiety supplement you can take outside of kratom. Another amazing attribute is the improvement to speech fluidity and thought compartmentalization. It is my go to for public speaking and allows you to keep thoughts in order and available so you aren't "searching" for your thoughts while speaking. For that reason it is great in social situations if you deal with any SA.
750mg prior to an event is great, or if you happen to need to always be on, then 750 x 2 works well. 750 am and 750 pm.
It needs to be taken with food, preferably with a fat source. In addition, you may experience headaches if you don't supplement a choline source, but that is not everyone's experience. I happen to get them, so I supplement Alpha GPC with it.
Effects kick in 45-60 min after taking and will last 4-6 hours. You won't "feel" it, but it will be apparent when in situations that were previously difficult to deal with ie. public speaking, social events, times of recall, etc..