When considering a certain program, there are 2 things to choose from; the institute and the branch. So my answer talks about both, IIT Guwahati in general and MTech in Computational Mechanics.

IIT Guwahati 

• IIT Guwahati is known for its extremely beautiful campus that encompasses natural beauty and offers a serene ambiance.
• The accommodation facilities of IIT Guwahati are excellent with every student getting a single room irrespective of their branch and specialization.
• IIT Guwahati gives equal importance to extracurricular activities and various clubs and societies help promote the same.

Computational Mechanics 

This course is the perfect blend of Mechanics and programming. The key highlights pertaining to the course are 

• The theoretical part primarily comprises FEM (Finite Element Methods) and CFD (Computational Fluid Dynamics) 
• Numerical analysis is also a significant part of this course. Maths lovers may find it interesting 
• C programming is also a part of the course
• You will be taught ANSYS at a computational mechanics lab
• A wide ocean of electives is available in the second semester wherein you can easily opt for subjects from the fluid, thermal, design, and manufacturing field.
• CM students are eligible to sit for all core placements with some companies specifically asking for them. Most of the companies recruit M.Tech Mechanical students for their R&D sector.
• If you invest a lot of effort and do your best, you can become a CAE (Computational Aided Engineering) engineer by the end of 2 years.

Overall staying and studying at IIT Guwahati will offer you a once-in-a-lifetime experience that you will cherish for the coming years.