Saints face Chelsea this weekend.
Puel said: “I know Eden very well. I started him in the first team at Lille when he was just 16. He was a young player without structure but with the same qualities.
“He was a fantastic player and stayed a fantastic player and you can see this. He takes pleasure in football.
“He still has the same capabilities as the first time for Lille when he played against Bruges in a friendly game.
“He took the ball and dribbled past five or six opponents and had the capacity to stay in control of the ball and give a very good ball for the striker.
“He has stayed the same.”