Brian McDermott tells BBC Radio Berkshire his side "were good value" for their 3-1 FA Cup win against West Bromwich Albion.
Three second-half goals saw the Royals come from behind to reach the quarter finals of the FA Cup for the fourth time in seven years.
"This group have shown real toughness, good mentality, and no little quality," said 54-year-old McDermott.
"There's no doubt in my mind we deserved to win that game. We're difficult to play against at the Madejski, long may it continue."