The German international has received criticism for his displays since joining the Gunners in the summer, but Ramsey has been delighted with the impact he has made.
"He has a few assists and a few goals, so he's settled in really well," he told UEFA.com.
"It's not always easy moving to the Premier League, with the pace [of] the game over here. He's a really grounded guy and one who wants to help the team, so that's helped him in his progression so far."
Ozil became Arsenal's club-record signing last September when he joined from Real Madrid for £42.4m.