The NFC North is the best division in football.
Greenbay Packers speak for themselves.
Chicago Bears have one of the toughest defenses and a pretty amazing offense with Cutler-Marshall-Bush-Forte.
Vikings have been complete in every phase of the game. Reliable offense, stunning special teams, and a fantastic passrush and overall defense that is finding its identity.
Lions have a potent offense but they are lagging hard this year.
Considering the Lions made the playoffs last season, I think that is fine that they are off to a slow start. They have time to bounce back.