I applied online and within a few days, was contacted by HR. They are very nice, and extremely approachable/friendly. Set up a phone interview with him, very informal and getting-to-know-you type call. Then had another phone call with their HR rep, also very casual/friendly. Then after a week or two of no communication (which was apologized for, and I thought that was nice) another phone call was set with an account exec which was a bit more formal and structured. However, it just took way too long and I ended up taking something else but I think they wanted to do another 2-3 phone calls or maybe an in-person. Super generic questions though, although in the second phone call I had to explain each part of my resume point-by-point.