My recent experiences from last month (1st time user).
Bought 50g Bali powder.
1st night I tried 3g - didn't do much.
2nd night I tried 8g. I poured the powder into a coffee mug, added roughly 4oz of water, and heated it to a boil in the microwave. Then I pulled the mug out and poured the solution through a coffee filter to filter out the powder. I put the now filtered solution back into the microwave and heated it for 1 min several times until the water level was boiled down to about an ounce. Then I downed it at about 12 am. The effects were almost immediate. It basically felt like I was drunk, with slightly more euphoria and moderately worse vision problems (i.e. hard to focus). The effects lasted for about 2 hours and I went to bed, feeling rather sober. Then, unbelievably, I woke up 2 hours later in a crazy opiate-type of nod. The nod was very intense, and so were the opiate-like itchies. This lasted all freaking night, until about 7am. I don't know if this is good or bad. The nod was great, but the sweating/itching sucked ass.
3rd night I tried 8g again. This time I just mixed the powder with water and drank it. It was unbelievably foul, and the powder is hard and sharp. It feels like drinking sandy water. As far as effects, it felt the same as night 2. Actually the effects felt close enough that I would NOT recommend consuming the actual powder, because it's just a step of unnecessary torture. The nod/itchies might have lasted a bit longer w/ the powder, but it's hard to say. All in all, I'd say use the microwave technique.
And that was it. It's very impressive for a legal high, but not something I'd ever do again because it just tastes so unbelievably bitter and foul. Also, I didn't get any constipation, but I did experience weird urinary retention. I didn't pee for like 18 hours after each experience. It didn't feel like I had to either. It's weird, you just wake up in the morning and instinctively go to the toilet except you don't have to pee for some reason. And don't worry about boiling down the solution to a lesser amount either, because the active alkaloids appear to be impervious to heat.
The strangest thing about the whole experience is that it was like two completely separate drug trips. Some said the high is speedy, others said it was like an opiate. For me, it was both. You feel kind of drunk/speedy for a few hours, then you feel normal and you think it's over, then you go into a crazy opiate nod for a few more hours. Weird stuff. I just think it's entirely too long-lasting for my taste. I was feeling the effects for 7-8 hours, and I generally don't want to be high on ANY drug for more than about 4 hours.