I worked there during my studies and I can say that the balance work/studies is perfect. You have to work a least one day a week but it is possible to work more if you want. They are very flexible.
The salary is also really good for a student job, and the people are nice
Cons
For a student job, it is ok, but as it is really repetitive, I couldn't work there full-time.
Futhermore, as you work in a kind of fridge, it is freezing