NTTF is particularly renowned for its practical-oriented learning pedagogy. In fact, the curriculum has more practical learning than any theory at all. However, here are some points to take into consideration. 

1. The courses offered by NTTF are diploma-oriented and they are not equal to any Engineering courses. 
2. Most significantly, you can secure on-campus placements, if only you are highly efficient in cases like these. However, you should make informed decisions regarding similar factors, otherwise ending up at some clerical service jobs is pretty easy. 
3. Most of the alumni students have studied at NEC Bangalore, clearly meaning that they have been exposed to good infrastructure for various lab activities.

The major pitfall that many people anticipate is that diploma courses do not have many options for a job. Thus, choose after you have researched more about your prospects.