People will point to a few odd mistakes but at the end of the day i can more than forgive them for what i believe he has brought to the team as a whole since his £21m move from Benfica. November - January our play was so laboured and predictable it was honestly laughable but since David Luiz came in imo there was improvement, Liverpool was a shocking match until Luiz came on and in Luiz's 20 minutes we looked more like scoring than we did in the previous 70, had we turne that game around we'd still be talking today about that cameo. Fulham the next week he was the bright spark, commanding in defence and attack and i still believe the pen should not have been given, then in the Everton and Copenhagen (both) match without Luiz we looked really poor and out of ideas. Ive never seen a more entertaining display by a centre half then with Luiz against both United and City, there is no 2 ways about it without him we would not have broken either side down. Our April premier performances to me were pretty decent and bar the Stoke game Luiz did really well and played with flair, however in the 2 CL ties with Manchester United we missed him big time, our display's in both legs just fell short of shameful. Luiz has also got a lot of flack for his first minute mistake that let Hernandez in at Old Trafford and while i was and still am a Carlo fan the way he scapegoated Luiz was a joke, but i thought he was outstanding after that a lot of players head's would drop but he put a more than respectable display in for the rest of half. Also IMO the Newcastle and Everton games were a new low for the season, both those games gave me a horrific taste in my mouth and also highlighted just how important Luiz now is to our side, our first 2 performances (bar the second half at Stoke) again have highlighted that to me Luiz is a must play if fit. All in all the guy has been a breath of fresh air to this football club since his January move and is now one of our most vital players and i still believe give it a couple of years and he will be the best centre half on this planet.