Since Emery came things have been completely different for Aston Villa. They are like they have been touched by a magic wand. Because Emery's system has been running like clockwork. They are even a title contender at the moment. Especially after defeating Manchester City by not letting them even play and defeating Arsenal right after that was enough to see them as a title contender for now. 

However consistency is always the key factor in this. Emery is currently the most impressive manager in the league undoubtedly. If he goes on like this he would deserve to take the manager of the season prize.