Joining Infosys

Hi Guys, can some one help me with some questions i have 1) Is it a good thing to switch to infy from IBM? 2) how much hike must i ask for during salary negotiations in infy? 3) Does infy have unlimited work from home as it is mentioned in the ambition box site? 4) what is the work life balance at Infy?

Thanks in advance for your reply.