Warren Gatland's men made it two wins from two in this year's competition with a 30-15 success at the Millennium Stadium.
Tries from Shane Williams (two) and James Hook sealed the win, with Hook and Stephen Jones kicking the other points.
"To get any win was fantastic for us," said Jones. "If we didn't win this weekend, last weekend would have meant nothing.
"We've got the result we deserved and we've taken a step forward," he told BBC1.
"All the guys have worked hard over the past couple of weeks. We're two from two so no-one can ask any more than that."
Williams' second try, which arrived when Wales led 20-15, was shrouded in controversy.
It was a sensational run by the wing, but replays showed he had strayed into touch before grounding the ball.
Man of the match Martyn Williams, who stepped out of international retirement to play in this year's Six Nations, insists the skill deserved the score.
“It was never in doubt!” he joked.
“The effort deserved a try. That was a great finish, a world-class finish and I think it was the crucial point of the game.”
Williams agreed with his skipper that following up their victory over England was paramount today.
“It was vitally important,” he said.
“If we hadn't backed up last week's result, it would have been a huge anti-climax.”
Williams credited the impact of Wales' new coaching team for their resurgence but also admitted luck was playing a factor.
He said: “A few 50-50 bounces are going our way and at the moment we're having a little bit of luck, so long may it continue.”
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