Pros
1) Not many. One of the main reasons has to be the fact that you can unleash your career outside India. This happens to be the most important reason to why Infosys successfully retains a major chunk of its strength. 2) Paradise for lazy people. At any time 30% on any given floor at Infosys are idle at work. It gives them enough time and less stress.
Cons
1) You have no control of your career growth - your options are always limited. You could be an awesome programmer but you might just end up being a really bad manager - not because you choose to be one, but because Infosys chooses that path for you. 2) You will end up working with a bunch of idiots (in other words, people who can't speak proper english and have been recruited from the worst possible colleges of India and those who have absolutely no passion what so ever for their job). Your chances are about more than 30% for this scenario.