I only interviewed with one person (the Area Manager) and was offered the job pretty quickly. Very easy interview process and the questions were reasonable. They have high turn over, so it didn't seem they were too worried with hiring the right people. It seemed like they just wanted capable people, so kind of a low bar.
Interview with supervisor and DM pretty commons questions. Just be yourself and be ready to sell. Previous sales experience is a huge plus and the ability to get along with people.
I applied online. The process took 2 weeks. I interviewed at Mattress Firm (San Diego, CA) in Aug 2021
Interview
A casual tour of the warehouse, along with outlining the responsibilities of the role. Just a few clarifying questions at the end of the tour, mostly very basic questions like asking about work experience, felon/immigration status, etc.