These are followings.
1. Very less salary compared to the magnitude of competitive exam and Interview you have qualified.
2. No special allowances or Perks which are provided in other major PSUs.
3. No specific work assigned. Whatever work comes, you need to do it.
4. Almost negligible manpower against the vastness of Project.
5. Multiple companies are involved in the project execution...so need to be mentally prepared for the blame game.
6. Project is totally rural based and lack of manpower here. Therefore, field tour lasts always more than two weeks.
7. As this PSU is entirely new one, no proper setup is available at the offices.