Tons of flavors; free sampling before you load up; and lots of toppings. Two options for sizing and line moves pretty fast. They offer a rewards card--probably don't want to get that otherwise you will be here EVERY WEEK haha.
I usually stick to 2 basic flavors--something chocolate-and throw in a "seasonal". For example over the holidays I loved their egg nog flavor!! The BF loves the red velvet and gets heaps of it when he goes!