Need information about ELLIM University of Sikkim and Indian School of Management - #2, Shree Bhuwan, Next to Canara Bank, L.T. Road,Dahisar

My name is Akhilesh Sharma and i stay in surat(Gujarat) and want to do MBA from one institute who's name is INDIAN SCHOOL OF MANAGEMENT which provide degree course of E-MBA of EIILM university (SIKKIM) So kindly guide me how trust worthy and reliable is this institute and univ