It feels like you are drinking the lingering effects of kava only. I was very spacey and relaxed but did not feel much of an uplifting or talkative effect. Very introspective. One of the weirdest parts was how sticky the mix was, it felt like and smelled like there was pine needles mixed in. Almost sappy. This morning when I cleaned the tanoa I had to scrape at the bottom to get the kava off.
I have not tried this specific ISA but I have tried others, and some other tudei kavas. They almost always give me a stoney feel. Not much if any kavain uplift or headiness. They also tend to exacerbate my constant low level dermo (i.e. dryish skin but manageable) to full on snowflake skin sluffing off. They are great at killing anxiety - but not for really uplifting. I would not recommend if you want to get anything accomplished. I don't usually get couch lock from them, but my thinking is typically muddled. I have not gotten any nausea from reasonable levels of kava, and I don't from ISA either, but YMMV. In general, tudeis are not my cup of
tea kava. The pineyness is also indicative of a tudei kava. Sleep is usually good - but effects do last until the morning and next day. I would use with caution as some people have more extreme reactions to tudeis. I think they have their place if used with caution and sparingly, but they are "different".