The burger I got was something really simple - two burger patties with grilled onions and Wisconsin butter. The butter totally melted through the bottom bun so it got sickening over bit.
The Straw-nilla shake is super yummy though. I'm not sure if it's something spectacular but somehow that first sip it definitely got me wanting more. I think they use Blue Bunny ice cream - not sure if that makes a difference.
I'll take my friends here if they don't have it in their hometown because it appears on the list of "20 chains that should be in every state" but if not, I'm not sure I'll be back for a while.