Pros
You would get to show off that you work on power plant DCS and might get deputed abroad. (Not that you actually work on it, but well... you would get to tell that to your friends and about the deputation part, if all you care about is living in a foreign land with no lifestyle....then hop on.... this is THE PLACE for you.) P.S. Lavish architecture in office. Join them and you would know why (I would not kill it all for you)
Cons
Everything. Nothing that you do here makes any sense to you while you work there. The software used is quite sofasticated but you would be inside a black box. So exploring the software that you are working on is a luxury. Asking why you are doing what you are doing is a crime. All the very best if you are shortlisted and willing to join (still??)