The interview process is too lengthy, they will take around two to three months to give you the offer letter. I have given 3 rounds of interview and still waiting for my offer letter. Even after multiple follow ups, there is no response from the HR. After completion of 2nd round they took 22 days to confirm me that i have selected for the next round. So you have to wait for their confirm about months. Interview was good for me. You can expect indepth questions about the process, so it will be little difficult.