To be extremely to the point:
South India: Brilliant Reputation, only after IIT-Madras I guess. People treat VITians with awe.
North India: Good reputation but a lot of rumors which are hilariously baseless. The interest in VIT is constantly increasing.
Outside India: Well, the big universities know about us (or I should say are just starting to get to know us) and I guess that is a really good thing. Other universities will come around