Never try to get any work in this bureau! Otherwise you'll get a big problem.
They deduct money for transportation (if they bring you to workplace & back home by their cars). 4 Euro per day. And of course they don't pay you anything if you travel by your own car.
They pay salary late.
It's impossible to get ANY answer on ANY your question. They never know anything, which is very annoying. The maximum what you can hear from them - "oh sorry, it was mistake. we fogot to do smth".
One time they pay you 100% for an hour 8.70 Euro, and the other time - the same 100% constitutes 9.30 Euro.
Polish people (the most of their workers go from Poland) get 6.25 Euro/hour. Is it legal at all? Every 5.5 month the Polish'es are made to have a vacation. Thus they can never get any pension.
It costs you 50 Euro if you are sick and need to go home in the middle of the day. 50 Euro for a way of 20 km!!!
They evade taxes. This can cause serious problems for workers.
It's very hard to get in touch with anyone from officeworkers. The telephone numbers on their website are invalid.
They pay salary according to the wrong CAO.

Hope that nobody of you would try to work for this firm.