Bento, appointed after the 2018 FIFA World Cup Russia, is working with the Korea Republic squad for the first time as they prepare for the AFC Asian Cup UAE 2019.
"I was impressed with his training programme," Son said at the National Football Center (NFC) in Paju, north of Seoul. "Bento doesn't miss small things, and he gives orders in detail."
After returning home with a 2018 Asian Games gold medal, Son joined the senior squad for upcoming friendly matches with Costa Rica and Chile.
The Tottenham Hotspur striker had his first training under Bento on Tuesday.
Bento will make his Korea Republic coaching debut on Friday when the Taeguk Warriors take on Costa Rica at Goyang Stadium in Goyang, north of Seoul.
Son said he will not disappoint in Korea Republic's first match with the new boss.
"I know it's his debut match," he said. "I will make sure he'll have good memories."
Son said the players are looking forward to the AFC Asian Cup 2019, which will be played on January 5-February 1.
"We are going to compete with the Asian Games title under our belt," he said. "It's not going to be easy, but we'll prepare hard. We have so many good players in this team."
Korea Republic are in Group C at the AFC Asian Cup with China PR, Philippines and Kyrgyz Republic.
Sources: Yonhap, FIFA via Getty Images, AFP
