I have a few friends from KJ Somaiya College of Arts and Commerce, so I can give you some insight into their BMS course. 

KJ Somiya is not a good option if you really want to pursue BMS for knowledge and not just for the sake of a degree. The teaching experience for BMS at KJ Somiya will not be satisfactory. 

If you prefer knowledge over a degree, then you should go to some other better colleges such as MCC in Mulund. But, if you just want a degree in BMS then you can opt for KJ Somaiya. KJ Somaiya has a huge campus. This is advantageous if you want to bunk lectures and have fun sometimes.