The Blues won the game via an excellent combination from Gareth Barry and Romelu Lukaku.
The Blues had been leading their Capital One cup semi final clash through a Funes Mori goal, before Jesus Navas levelled the scores for the away side.
Just two minutes later though, they were back in front as midfielder Gareth Barry put in a delightful cross to be converted by striker Romelu Lukaku once again.
It was an excellent team goal to put his side in slight command of the cup-tie ahead of the second leg, and Mills was one who was impressed.
"[It was a] brilliant ball in from Gareth Barry,” he told BBC Sport.
“A delightful cross, floated in perfectly. Lukaku, this time, kept himself onside. It was absolutely fantastic,” he told BBC Sport.
Roberto Martinez’s side will now be hoping they can travel to the Etihad and secure a positive result to get them into the final.
It is likely to be a tough ask though, with Wednesday’s win their first over Manuel Pellegrini’s side since October 2013.
Even worse, they have not won at the Etihad since a 2-1 win back in December 2010, with three of their last four visits having resulted in losses.
With one foot already in the final after the win at Goodison Park though, they will be confident of getting the result they want.