"Both technically and in terms of sheer human interest, Guinan is certainly a major American painter, one whose work can be expected to transcend all mere trends and fashions." -Edouard Roditi
“The French have known the painting of Robert Guinan for years, whereas he remains quite isolated in his own country. He is in the line of Hopper whose atmosphere of deserted streets and silent, motionless bars he recalls.”
Beaux Arts magazine
"Robert Guinan might be the greatest American painter you’ve never heard of."
-Chicago Public Radio