Herrera featured in United's Capital One Cup defeat to Middlesbrough on Wednesday and described the comfort level that comes with belonging to the Old Trafford outfit.
The Spaniard told Manchester United's official website: "I feel at home at Manchester United. I am enjoying the best league in the world. I think it has the best organisation, the best stadiums, the best atmosphere."
"I remember playing against Cambridge in the FA Cup and we waited 25 minutes because the Cambridge fans were coming on a bus and they were delayed."
"I was thinking that's really, really good because they are thinking about the fans and football is about fans.
"I always say the same – if the footballing world doesn't think of the fans, it's going to lose the passion and the love. So I was impressed but I was very happy because the fans come first here."