Mesa is good in the way that they don’t claim to be competing against IIM/ISB or dissing them. It’s more around being a much more hands on ISB, specifically for the startup ecosystem.
Had attended their info session, one of the founders take them - team is not pushy so that’s good. Applications are invite only, can get invited to apply after attend only after understanding about program. Still early days but seem to have the fundamentals right - would recommend you attend Info Session and make the call for yourself :)
What personally attracted me was the team and the founding cohort, seems to be really good quality.