IIIT Guwahati seems to be a good option but one must have heard that “All that glitter is not gold”. There are many colleges having people who completed their PhD from IIT. Doing a PhD from an IIT doesn’t make that person a competitive teacher. 

Many of them may have acumen but lack teaching abilities. Very few of them are capable. The course structure is a plus point but still one should not join IIIT Guwahati. It is still not well established plus the factor that makes a college good or bad is the quality of students entering them, and its doubt that the student finds a quality bunch of students there.

The table shows a brief overview of the institution:

If you have a good rank in JEE Main then you can get IT at some of the good NITs. Otherwise, the you have a good chance of getting CSE in the new IITs, and both the options are far better than joining IIIT Guwahati.