Similar to any Ops or GM role at the company, there was a phone screen, an excel test, a creativity test, and in-person interviews. HR was nice and usually pretty responsive, but wasn't familiar with the details when I asked questions about the tests.
The biggest issue I had was with the final round. I was told it would take about 3 hrs, but when it was scheduled, it was only for 1.5 hrs. It was scheduled 1 day prior (luckily I had already prepped). It was a panel with 5 people, and we started late waiting for people. Then, instead of getting into the presentation, I was told to go through my resume because one of the panelists didn't know anything about me. You'd think the previous interviews would have shared a summary. So now instead of 1.5 hrs for the presentation, I had about 1 hr. The presentation I thought it went well.
I didn't get the offer, which I am fine with if I'm not qualified, but the feedback from HR was that I didn't talk enough about forecasting (not a topic in the instructions). I had monthly and quarterly goals, but if I'm hiring someone, I would obviously ask them in the interview about a topic I thought important. That didn't happen.
I was also told my personality and experience was a great fit for Uber, potentially for another role. I found another role that I brought to HRs attention and got no response.
I probably spent a solid 40-50 hrs in total for prep and doing the tests, interviews for what I felt like was poor planning and poor feedback. I have interviewed through all the rounds with and even worked for the likes of McKinsey and early stage startups and while their hiring wasn't perfect, I didn't have issues like these.