Felix is the biggest signing of the summer and the Uruguayan has been impressed by what he's seen.
"I saw him at Benfica and he did spectacular things," Forlan added.
"He's a different player and he's lucky to reach. A hardworking and humble team.
"They know that they've achieved what they have through effort and sacrifice and some of that is down to the coaching staff.
"If he's humble, respectful and can listen, he'll be a player who grows up to give us a lot to talk about. He has a big future."