As I am currently studying in IIT Patna, I consider myself capable of answering this question.
IIT Patna definitely has one of the best campuses in India. Well built infrastructure, facilities as diverse and handy as any other old IIT(not as large on scale though). And safety should not be a concern here. Also, IIT Patna has world class faculty for all the branches here, for B.Tech as well as M.Tech. Let’s go through this one by one.
SAFETY:
IIT Patna is a totally safe place. People have preconcieved notions about Patna(Bihar in general). But as far as I have seen nothing of this sort can be claimed or believed.
IIT Patna is situated in Bihta, approx. 35Kms from Patna city. It is a well guarded place,