I've had some positive and negative encounters with these Red Heart pills. It is all very confusing and can not be explained however I do know it resulted in an embarrassing amount of debt.
I know some friends, three actually, who all got these pills - their pupils were large, they were happy, stimulated, energetic - perhaps amphetamines were a main contributor but one friend stated the feeling of MDMA - I doubt it though. Either way, the pills were good for them.
My friend got some, went back to his home town and gave them to his friend who has never done any drug other than marijuana - they did not work? Completely dud. His skin went pale and that was the end of the effect. The strange part of this tale is that the pills my friends had and the pills this guy had were all from the same batch.
Either way, after this drastic experience I know to stay away from Australian pills -always and forever-