I hafta say the Lions are too inconsistent. They can look decent for one half of a game and then look like shit in the other half. In today's game, they gave up some big plays when a Ravens receiver was left uncovered. It happens, but too often for the Lions to be a winning team. They gave up a 4th and 19 pass just before the game-winning FG; you just can't do that. Another time they left a Ravens WR wide open in the end zone for a TD. Again, mistakes happen but the Lions make too many of them.
So, I don't think they are a good team now, BUT they could be a year or two down the road. It's a young team with a lot of rookies and inexperienced players, and so I think the potential is there to be a pretty decent football team.