ISB or any MBA is not worth it in today's world imho.
Firstly, hiring for traditional MBA jobs (Consulting, IB and FMCG) has gone down drastically. MBB recruiting has been poor all over the world, not just india.
Secondly, MBA has zero value in today's world as we are in a skill based economy.
I know people who went to instead and LBS. Even with 5 years of experience, they couldn't find a job in Europe. Now they're back in india and are working for 30 LPA.
I see a lot of people on LinkedIn who went to IE, ESSEC, ESADE, EDHEC, come back to India and work at startups in some random marketing, ops or founders office roles.
I'm sure none of these people will be making even 40 lpa.
ISB fees itself touches 50L, and including mohali campus, they have around 900 students. Out of these 900 people, how many do you think will land even a 50+ package???
Your post MBA salary also depends highly on your pre MBA salary. Don't forget that.
Also, startups don't give a crap about your MBA. Do an MBA only if you want to get into F500/1000 or IB/Consulting.