The defender was a key reason why the Black Cats managed to survive.
Along with Jan Kirchhoff and Wahbi Khazri, the 27-year-old arrived during the January transfer window to try and give Sunderland a fighting chance of beating the drop.
And while the Black Cats were in the bottom three when the Frenchman arrived, his form helped Sam Allardyce's men secure their safety in their penultimate game of the season.
And Kone conceded that he was not expecting to make such an impact so immediately.
"It shows that we've adapted well to the Premier League, but it's not just us, it's all the people around us as well who welcomed us from the start. They helped us," he told the Echo.
"I'm really happy with how these four months have gone.
"To be honest, I didn't know that I would adapt so quickly."
The centre-back's influence meant that Sunderland lost just three of the 15 games they played following his arrival, while they also managed to keep four clean sheets along the way.
And it was his brace against Everton that helped them confirm that they would be staying up.
But Allardyce will be reminding his players that Sunderland's great escapes have swiftly been followed by struggle the following season in recent years, so will be looking to the likes of Kone, Kirchhoff and Khazri to maintain their form so that the situation does not becomes desperate once again.