I was contacted by one of their HR partner from Linkedin. It took one month for me to speak to the hiring manager after I went through the first round with HR. The hiring manager was nice. She asked about my professional experience and why would I want to leave to current employer. No hard questions at all. Then one week later is the onsite interview, met with 2 managers, 1 director and 1 VP. All of them are very nice to me, I really like them. The interview was not hard, all about experience and behavior questions that you would expect in any interview.