i got my free sample of 4-fa in the mail two days ago as well. got a 100mg sample of mxe from a different vendor that same day. boy was i happy when i opened the mailbox lol.
anyway, i took the mxe that night at like 11pm (all of it... i have a huge tolerance to nmda antagonists. didn't really feel a whole lot at that dose. meh. good thing i'm taking a break, just tried that sample because he was a new vendor, he needed reviews, and it was free =p).
then the next morning while still awake at 9am i snorted 60mg of 4-fa. effects were pretty immediate... it hurt like hell but for less than a minute. also i swallowed another 60mg at the same time. a few hours later i swallowed another 200mg. this time i weighed the powder on my scale, licked my finger, picked up the powder with my finger and then licked my finger. this 4-fa felt sorta like pop rocks on my tongue and tasted realllly strange. not bad necessarily (though the pop rocks burning did feel caustic), just a verrry strange taste. this kept me going until 9am.
nothing to do today and i'm bored, so i took another 250mg of 4-fa orally, and plan on taking another 250mg later (the sample was marked as 500mg but was really closer to 750mg.) oral dosages seem like they're maybe half as strong as snorted, though the mxe that was still in my system for that one snorted dose might've had something to do with it.
oh yeah, and one other thing... by the end of the day yesterday, having been up for like 36 hours, smoked a LOT of JWH-122 and AM-2201, did MXE the night previous, and was on like 300mg of 4-fa... i started getting light 2c-like visuals. you know, the aztec looking stuff. they would just come intermittently and never stuck around for long.
this stuff isn't as potent as a stimulant as amphetamine is at a mg per mg basis, but it has the potential. there is definitely something serotonergic going on here that doesn't happen with unsubstituted amphetamine.
From reports on erowid and elsewhere I had the impression that 4-fa was active at 100 to 150 mg orally and that it produced pronounced euphoria in the first couple of hours and then amp-like stimulation for a further four hours. From your experience of the free sample and from mine it seems milder in effect than I would have expected. I sampled again at the weekend with some friends who are experienced in stims and whilst it was well received and certainly produced some empathy it wasn't earth shattering. In fact three hours after ingestion everyone decided that a line of 4-mec was needed as a livener. Can any experienced hands offer any opinions?