Im not in accounting. I work in a small company. Can really say, your life dont cut short faster. You get what you paid for. As far as I know if your pay above a certain number or exec level you get nothing for OT. Allowance is the only thing u get. Perpared to, work be sick and stressed out of your life. The extra income is not worth it.
The only benefit is the name of thethe big4 and maybe financial support/benefit once u manage to be permenent for further studies/extra papers.