Client Sevices applicants have rated the interview process at MSCI with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 64.1% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
The interview was just the same as the email is. Just study and get familiarize with the terms and I think you are good to go. Dont get too scared as most of their recruiters and friendly.