I recently took NCT's level 1 Improv Workshop and I LOVED it. My first class I awkwardly sat on stage and nervously laughed and couldn't come up with anything. By the end of the class, I was kung-fu-ing my way to rescue Princess Miyuki with a prince who still lived with his parents.
The class focuses on the basics of Improv - listening, "yes, and", relationships, responding emotionally and staying rooted in reality. Dorian was able to provide consistent guidance and constructive criticism to move me forward as an actor. The other students are equally awesome, as everyone is at least some form of funny.
I would recommend (and do recommend!) everyone I know at least take a level 1 improv class, and I love the people at NCT. The skills I've gained from 6 weeks of workshop have already helped me become a better listener and improviser at work, as well as with friends. Looking forward to more Improv with NCT in the future!