Clean focus"Clean wakefulness that feels like Adderall without the cracked-out feeling", the headline effect. Focus you can direct, not a buzz.
Verbal fluencyFewer "ums and uhs", easier to hold complex ideas in your head and get full sentences out. The reported CEO / high-output effect.
Memory and learningBDNF and NGF drive synaptic plasticity, the raw machinery behind learning and forming new connections.
Processing speedUsers describe the brain computing and processing information faster, less "loading screen."