The Lions are a very good team. Their lone loss was against the Bucs who are under rated but the Bucs have to make a run or else they will miss the post season. Even the Eagles lost to the Bucs so the NFC like last season is pretty wide open.
The Packers I think are sneaky good while the Vikings seem very opportunistic but hard to gauge if they can hold up down the stretch. The Lions, Vikings, Packers and Eagles all will be chasing the #1 seed so it will be interesting to see how this shakes out.