You can watch the whole interview
here, but I transcribed the Em part below:
"We all respect Eminem so much on the mic, man. It's like a kid that grew up playing basketball being able to hang with Jordan. You know what I'm saying? That's how we feel, like 'Good Lord!'. When we're recording and he listens, and he peeks in and you get just a little pointer or two, we're all just like 'yeah, yeah, yeah!'. You know what's so funny, man? How humble Mr. Marshall Mathers is. He be the guy like, 'Joell, I was listening to the verse, I love it - if the end - if you could just come out of your verse a little stronger, I think it'll have an impact' and then wait on my response like it matters to him. You know what I'm saying? Like, you know, artists [unintelligible] with their paintings, but he really, really cares. He really, really cares how you feel and if I would tell him like, you know, 'Em, when I was coming out of it, I really wanted to come out of it that way for this reason' he'll be like 'Oh, okay, cool! I didn't know that was what you were trying to do, I was just - you know - " He's the most humble guy, humble superstar I've ever been around."