I don't go here too often -- usually for lunch with a friend that works in the area -- but when I do go it's always a pleasant experience. Both times I got the fries and I ADORE them.
Customer service is great! Everyone is friendly, and they'll even clean your table for you. I know some fast food places are picking up on that and it's a cool feature.
This place reminds me a lot of Steak 'n' Shake, but seeing as I lived in Texas for several years I do like SnS better. However, Freddy's is certainly nothing to shake a stick at. Easier location to get to and plenty of seating for all! Their prices are higher than SnS but they also have a drive-thru (huge plus).
Taste-wise, I enjoy it. I've had the fries, fries sauce, and burgers. Those three are pretty darn tasty. I definitely could NOT eat here every day because the meals are heavy (I ate around 2:30 pm and now 6 and some change hours later I still feel it in my tummy), but it's great to relax and get a bite with a friend.
Want to try their chili cheese fries... Perhaps next time. Mmm I love chili cheese fries.