One of my friends graduated from JNTUH in Transportation Engineering. Here is his review of the M.Tech courses offered at JNTUH.

• According to him, the academic environment of the institute is not that great. It is especially true for the Civil Engineering Dept. The department has experienced professors but they hardly take the classes. Obviously, it is not true for everyone but most of the professors are more engaged in their consultancy work than teaching. 
• The lab assistants are also not cooperative. If you don’t have a good relationship with them, then your project work can't go smoothly and it will take longer than the estimated time.
• The placement record for M.Tech branches at JNTUH is not that great. According to the recent placement highlights, the placement average for M.Tech is around 75% and the average CTC offered is around 9 LPA. 
• Regarding research, if you don’t have any new ideas for doing research then you will be given a research abstract, which was previously completed but with slight variations in it. The professor doesn’t encourage students to take on new research topics. 

According to my friend, it’s better to keep JNTUH as your second preference. Choose Osmania University, if you have an option.