Greetings!
It depends what you want to do and how much dedicated you are towards your research. The institute gives complete freedom to the research scholars to choose their supervisors and their field of study. It is an excellent place to do research and get your publications. The aforementioned points may not be true for many other universities in India. The scholars are paid well as of now. The funding for their research!!! that is same as other Government institutes. If you join under a funded lab then you can do better, but others could also make use of facilities available from funded labs in VIT. It is one of the few deemed universities which encourages the scholars to come up with innovative ideas. Overall it is a good place to learn and educate yourself, but it depends on your dedication towards your work.

I hope this was helpful. Thank you!

Hey!

yeah. doing phd from top private colleges like VIT is good. even NIT is good. they offer various topics and also a guide. the duration depends on your own projects. your phd is worth.

but what i recommend is, write gate exam and get into some IIT for phd. that would be recognized internationally. and also the fees is low.

i hope it helps you