Is the following review positive or negative?

For a chain place, they are pretty decently good I must say. But the reason for the 5 stars (which I don't give out easily) is more for the service. I am constantly blown away by how good the cashiers are here. Excellent Customer Service. That's a lot coming from me since I used to work for a company where we were known for our outstanding customer service. My expectations are high.
positive