Former Atletico Madrid midfielder Partey has played two Premier League games, lost both but impressed in each, and Essien is confident the Gunners have a star on their hands.
"I know him, I have seen him play a couple of times and we do talk now and then," Essien told Goal.com. "If he has any questions, he can always contact me for my thoughts – except when he plays Chelsea.
"But I wish him well and I am looking forward to seeing him do very well for Arsenal. They have made a great signing by bringing my countryman to take on the Premier League.
"He is more of a typical No.6 than me. He is very good on the ball, wins duels, has good speed, reads the danger well and he is a very complete midfielder.
"When I arrived in England, Arsenal were very tough, with Gilberto Silva and a great midfield, so it was a tough team to play against.
"I think it is a great move for him too, though. Arsenal is a great club. The Premier League is also brilliant, so it will help him to improve his game as well."