Pros
It keeps you happy You will find maximum percentage of ppl who have stayed for more than 3 or may be 5 years You can get shortterm onsites (if you are not in really bad project/line), this is good for freshers but if you are looking for long term onsite after exp of around 3 years the chance will be very less compared to other service based companies. So it is a bargain deal and you have to decide what you want
Kontras
There are lot of ppl with 5 years exp and working as developers so going up the ladder can be difficult Long term onsite is rare AMdocs is best in telecom domain but once you have telecom domain expertise wwhere will you go.. you cant go to Tech Mahindra as they wont be able to give you hike.. So option are less in telecom damain and in all probability you will have to change the domain while switching