First contacted by HR. Scheduled a phone interview with a higher level PLD Engineer the next week. Afterwards, they wanted an on site interview a few weeks later, and flew me to Milwaukee for it. The on site interview lasted all day, from about 9 AM to 3:30 PM, and I talked to at least 6 different people, one being the HR representative. They gave a tour at the end of the day. Everyone was friendly, and it was a good experience overall.