One thing which ASMSOC at NMIMS really lags behind is the campus, if you can call it that. Being in Mumbai which is a supremely crowded city, SVKM (the parent group behind NMIMS and other colleges) has put a number of colleges within the same building. My building personally had 5 colleges, the most famous of which was Mithibai College.
There are two girls hostels which are pretty good and are situated within a 10-15 minutes walkin from college. They're situated in pretty safe areas, and the warden and security are always on alert. From what I have heard from my friends, the boys hostel may need some work to reach their level.
I personally rented an independent flat with some of my friends. The flat renting culture is pretty established in Mumbai, and most students choose to do that. Be warned however, that Mumbai real estate prices are super high. No decent 2 BHK will come under Rs. 40,000 per month.
The quality of classrooms which we did have was top notch. Air conditioned, with proper benches, white boards and projectors.