Vantaggi
Depending on at what location you work for Infosys, you'd find the pros as: - reasonably good pay, - reasonably intelligent coworkers, - better than average future career prospects, and - better than average work-life balance for this industry (tech consulting)
Svantaggi
There is only one con - and that's the catch. No matter where you are, majority of your coworkers will always be based offshore (India or China or Mexico or Brazil), and will almost always be a mixed bag of largely freshers, who will have no clue of the technology they are working on, and chances are on any given day you'd spend more time teaching them the technology and solution than you would spend with your clients. Sadly, the company invests very skimpily on its in-house talent development, and believes that somehow if you let people do a job long enough, they will learn to do it good. This innate belief in experience-based learning is, in my opinion, what's holding the company from becoming a real consultancy provider.