Hey, Plano!
I was still living in Allen when the first SnS opened up at Grapevine Mills. MomChick and I gladly stood out on the curb for the two hours it took to get a table. (It was like a Midwestern reunion out there, lol.)
The fries are pretty much their trademark. You'll eventually start craving them. The chili is also legendary.
Oddly enough, I never really liked SnS when I was still in the midwest and could get them all the time. It wasn't until they suddenly showed up in Dallas that I started to really like them. (They're still more expensive than any other drive thru, but worth it when the budget allows.)