I have only tried this compound once, but it instantly became one of my favourite recreational stimulants. I would almost say I like it better than MDMA, especially considering it feels much cleaner and the after effects are not as tough.
The dosage was 130mg, next time I am planning to use 120mg and add a 50mg booster during the peak, to try and extend the empathogenic aspect, which, like Ximot stated, seems to fade after about 2,5 hours, leaving one behind with an amphetamine rush.