"It's the ultimate challenge playing against the world champions," says Edwards, who made his first visit to South Africa during Wales' recent summer tour.
"This team is physical, but I think they also add a lot of skill to their game. Their off-loading game is excellent and they've also got the X-factor.
"You are looking at (Ruan) Pienaar possibly playing at 10, who's a magnificent rugby player and he could be a supertstar in that position, who knows?'
Wales go into four successive Tests against South Africa, Canada, New Zealand and Australia in confident mood following their Six Nations triumph but Edwards knows his men will have to raise their game to trouble the Boks, the All Blacks and the Wallabies.
"We realise we did very well in the Six Nations, but I think we all know this is a step up from that.
"We're playing the world champions in our own back yard and we're going to have all the passionate Welsh fans behind us and we're going to give it everything we've got.
"Looking at history you'd have to say percentage wise one victory would be fantastic.
"For us to compete with these teams we're going to have to up our ante and I thought we finished our Six Nations fantastically well against France. But I think if we're to beat these teams we'll have to improve again on that. We're very determined to do that."