Modafinil by Modup
A next level smart drug, often compared closely to NZT-48 from Limitless.
Modafinil imbues an unfair cognitive advantage to those lifehackers not afraid to dable with pharmaceuticals, from night shift working emergency room doctors to programmers and helicopter pilots.
A little pricier than others, but I read they'd passed an official, independent lab test, and were the real deal, so I didn't mind paying a bit more.
Results: Shipping was fast in my case, under a week. They were responsive to questions during pre-sale and gave me tracking info. I also liked the layout of http://www.Modup.net . . . simple, but easy to navigate and pay with Bitcoin.
The biggest benefits I noticed were in a HUGE increase in energy and productivity...I was super focused. I didn't really leave the house, so I can't speak to the social confidence or verbal ability, because I was working on a big project and needed to push through.
Definitely recommend, but I can't compare them to others since I haven't tried anyone else.