I have been there once. The cakes looked very good but I had a sandwich of arugula and ham The bread has been baked by them and was thin and tasty. First quality ham Quick service, and the orange juice is the best one I have had since long time.
A piece of advise: take your time and go there.
Opening hours not very convenient. They close, as everybody, between 12.30 and 17.00.
Not expensive, at least not more expensive than many places in Paraná.