The five-star prospect, the West's top prospect in 2012, took his fifth, and final visit this weekend to Auburn.
"It went good, I had a good time out there," said Armstead. "Gabe Wright was my host."
Armstead was able to spend a lot of time with the Tigers coaches too.
"I had a couple of meetings with Coach (Gene) Chizik and Coach (Curtis) Luper and Coach (Mike) Pelton," said Armstead. "Those went good."
He also met with Auburn basketball coach Tony Barbee.
"I met with Coach Barbee and we had a good meeting and I got to go to a practice and a game," said Armstead.
Armstead said he was impressed with the facilities at Auburn.
"Everywhere I've been, the facilities are really nice," said Armstead. "Cal, Alabama, Notre Dame and Oregon, the facilities were nice. And Auburn's were right there. Everything is brand new and they just have really nice facilities."
Armstead said the Tiger coaches want him as a defensive linemen.
"They're recruiting me as a defensive linemen and they'd figure it out if I go there which spot I'd play," said Armstead.
Armstead said this trip differed from some of his previous in some ways.
"I have a real good relationship with the coaches so this was a real chill visit," said Armstead. "I really got to know the coaches and players a little more. The coaches were real sincere and I feel like I can trust them."
Now Armstead is gearing up for his decision.
"It's my last visit," said Armstead. "I'll make my decision in the next couple of days. Cal might be coming in for an in-home visit still."
After being a longtime commit to USC, Armstead said he was glad he took a second look at the recruiting process.
"I'm glad I did the trips," said Armstead. "I definitely had to see the schools before I made the decision."
And he said he's not worried about making that final choice, from the four schools he's still considering, Auburn, California, Notre Dame and Oregon.
"I'm not stressed at all," said Armstead. "I have to make the best decision for me. Not for other poeple but make the best for me so this was important."