Pros
1. Job security - job is secured, but.... 2. Learning - Wide scope of learning, but... 3. Interpersonal skills- Ample scope of developing interpersonal skills, but... 4. onsite opportunity - Good onsite opportunity, but...
Cons
1. Job security - job is secured, but your salary may get decreased(in case of rating is less than last year's rating) if you are not critical resource in current project or if you are not a pet of your supervisor. And finally, you are compelled to leave job. 2. Learning - Wide scope of learning, but you may be asked to work on technology which is outdated or not matching your interests. 3. Interpersonal skills- Ample scope of developing interpersonal skills, but development on negative characteristics of personality, e.g, learning of internal politics, buttering of supervisors, show-offs. 4. onsite opportunity - Good onsite opportunity, but conditions apply. For example, 3 years exp in current project or similar criterion. Anyway for US opportunity, TCS sponsors L1B visa. Chances of rejection of L1B visa from TCS is 75%.