Sorry if this seems a bit spammy, i've written a fairly comprehensive TR on this
here based on my experience at the weekend of 250mg over the course of the night.
As a long time K user, and someone who once had a very sizeable habit i hope my report will be valuable to serious ketheads and those with high tolerances. No offence to the previous posters here but these 20-30mg doses will do nothing for any serious K monster.
While 250mg over the course of the night seemed to be ok (although a little excessive) for someone like myself, i do think that, unlike K, there may be some serious risks with this chemical due to its opiate like properties. I really must recommend extreme caution not to get too carried away with this one. Please read my report for more info.