The interview process itself was mostly straightforward, other than HR being unusually slow to respond. It was also not made clear that the interview would be a group interview: I was told I'd meet with the Marketing Manager - it ended up being her, the art director, the CEO, and the head of HR. Not necessarily earth-shattering (they were all very nice), but would have been great to know going in. HR also got strangely personal/political in conversations prior to the interview, which was mildly uncomfortable.
My biggest frustration came after the interview, however. After two weeks of radio silence, I reached out to HR via email and phone about the status of my application, and got absolutely nothing back. One week later, I followed up again and still heard nothing. I had been told in the interview that the pay I was asking for was perhaps more than they could offer, but I received no feedback to that end after leaving their office, not even a "We've decided to move forward with other candidates." Overall, it left a bad taste in my mouth. I had felt good about the interview as a whole, and I'm still a big fan of the company as a whole, but I wouldn't have expected that treatment afterwards and found it very disappointing.