I haven't checked these vids out, but I will say that he is an uber-talented lyricist beyond doubt.
My only beef with him is how far he takes stuff, like talking about how his uncle takes took him in the shed and buggered him when he was a child and shit like that. I hate it because he has a huge fanbase of young kids who don't need to hear about shit like that.
My kids for example. They are huge Eminem fans, but thankfully they understand how music can be dangerous and they avoid songs like that.