BILLA has an employee rating of 3.6 out of 5 stars, based on 72 company reviews on Glassdoor which indicates that most employees have a good working experience there.
I work together with, by my definition very reasonable people who are open to helping me learn what they want me to do. I feel they don't want me to do things that I feel I am not capable of.
Cons
I suppose the working experience varies from store to store. The first Billa I started working at, I found two of my colleagues very repulsive and I chose to leave. The second Billa I joined, I found my colleagues much friendlier.