I used his youtube video on IMBC when I first learned how to make IMBC. I think I watched it twice because I was worried that it would be difficult and I would mess it up..but I have to say, I think it's fairly easy to do. I still make IMBC predominately and it's not a big time consumer or a pain to make. I am a bit heavy handed on the vanilla as well.
also - I think it's less sweet than powdered sugar bc but it's still sweet, smooth and silky.