Jorn thought very highly of them.
Jacqueline de Jong
They wanted to associate the “situationist” label with their works. We were resolved—and with good reason—not to accept it.
Raoul Vaneigem, Self-Portraits and Caricatures of the Situationist International
I particularly liked Kunzelmann, a joyful companion, a good drinker … He wasn’t a painter. He was the “thinker” of the group to some extent—the one who carried the mantle of theory. 
Raoul Vaneigem, Self-Portraits and Caricatures of the Situationist International