My review is regarding GNIIT from NIIT bandra.
I am a GNIIT student from NIIT bandra and I think its is best to do GNIIT course only if you are ready to give ur 100% to it.
I dont know about other branches but bandra branch is good regarding faculty, teaching and all (its my personal experience).
I know students who are irregular and not serious about this course and when they dont get certificate and placements ( according to GNIIT rules which are clearly mentioned in students handbook ) give bad names to institute.
Whenever an assignment (ISAS or project) is given most of the students are not interested to complete it, leave completion they are dont even know what their topic is and not concerned at all and obviously because of this burden comes on the students who are serious and interested (i am not saying this just like that but its my personal experience).
As goes the saying Only the curious will learn and only the resolute overcome the obstacles to learning.
I am not saying that it is one of the best institute but if you are really serious about the course you wont regret it.
What is important is to keep learning, to enjoy challenge, and to tolerate ambiguity. In the end there are no certain answers.