It was waste of time for me and interviewers. Interviewers did know what they are looking for in a candidate. They could have done phone interview and made sure that I have prior experience in specific thing they are looking for but instead they decided to have face-to-face interview to find out what I can do for them. Entire day gone waste for me and also interview preparation time.

I didn't find my interview stages all that tough but I've observed them to be a lot tougher on others for the same job title. There were meant to be 2 stages but for me there were 3 with the last one an HR interview.