Probably the best value for money signing that Wenger could have made. While Mikael Silvestre is hands down his worst.
The 6' 4" central defender is having quite a season and if this continues an England call up maybe in the cards. He looked very good against Spurs with his physical presence and his threat in the box off set pieces. Yes, he is a bit slower but patience it seems is a virtue. He definitely looks better than Matthew Upson and even Joleon Lescott in the depth chart.