Pros
When you get to work for prestigious ISRO 1. You can build core competency in one campus. 2. In house facilities like testing, machining, quality, research etc are brilliant.
Cons
When you work for ISRO as a contract engineer thru Ambimat Electronics 1. You don't get any type of leave. If you are absent due to medical reason then also salary would get deducted. Employer do not look after its employees. 2. There are no cons as such working at ISRO.