My experience with this wasn't great.
I signed up, and even though I used the proper "free for 3 months" links, they charged me the $8.99 plus tax starting day 1. I complained to them, they admitted fault, offered $15 in food credits as an apology, but never issued either a refund or a food credit. So I disputed the charge on my credit card. Annoying hassle.
The other thing was that the coffee at my nearest Panera store always had a burned taste. There were two other Panera locations but they were further away and I wouldn't normally be traveling by them.
I avoid gluten so there's not much food-wise that I can buy there.
The app and ordering process was great, though.
I canceled before the first month was up.