Pretty darn good!
I usually eat at Unphogettable because that is my fiance's favorite place, but Pho Ao Sen makes my favorite spring rolls! The presentation is fun! I love the extra lettuce bursting out of the spring roll. I also personally like the peanut sauce at Pho Ao Sen over Unphogettable.
The decor is nice. The place is clean. The service is good. It's the most expensive Vietnamese restaurant I go to in Arizona, but not by much.