The England squad have been working hard in training after touching down in South Africa for their three-Test tour, which kicks off this Saturday.
Youngs, who will be hoping to add to his 74 England caps when the first Test takes place in Johannesburg on Saturday (kick-off 4.05pm BST), says the make-up of the squad has created an excellent atmosphere.
“The spirit has been fantastic, it’s probably the best vibe I’ve known it to be," he said. "Everyone is very excited about the opportunity of playing out here at Ellis Park and the history that it has.
“Everyone has come in straight away and contributed, so you’ve got a lot of young guys and boys that are new to this environment, but they’re coming in and trying to add to the group which is great.
“There’s a lot of experienced boys who have toured a fair few times now so they know the importance of gelling really quickly, and we’ve also got a lot of guys who have played together with England for a long time so that combination between the young, energetic lads within the senior lads with knowing how things work, you combine that and the mood has been really good.
“We want to make sure we come here and we’re successful. I was here in 2012 so we want to make sure we do better than we did then and the opportunity for us is to win the Test series,” he told englandrugby.com.