The interview process was fun and really left me wanting to join their company. I interviewed with two engineers. They did a large number of on-campus interviews on the same day, but they were enthusiastic even tho I'm sure they had interviewed 14 or more individuals by the time I met them. They asked me questions about my experience and had marked notes on my resume ready prior to the interview, The interview questions were mostly standard coding questions with one meant to gauge teamwork qualities. I left the interview happy. Then came the dreaded HR. I received a call about a week or so later saying I got a job offer, while I couldn't talk for long at that moment the recruiter assured me she would get back in touch soon. She had sent my actual offer letter that day. Unfortunately, she proceeded to go on vacation for two weeks. I discovered this a week and a half later when I attended a dinner for all of the new hires who had received offers. I met great people and again really liked the company. However, I still was desperately trying to get in touch with my hr rep as I had received other offers for $8k-$18k more and wished to negotiate a better offer i would be able to accept. Unfortunately after a few emails, her ignoring our scheduled call and only calling me back after I, as a voicemail, mentioned I had other offers did she respond. She said they would not negotiate unless I sent them copies of the documents detailing my other offers un-edited. I casually asked if that was legal, to which I was told yes and that I must do it if I wanted to negotiate a better salary. I took a few days to write back a well-written response vetted by many of my colleagues basically saying morally I didn't feel comfortable doing this and that I would appreciate the best and final offer. On the last day I had in order to decide or the offer would expire I got an email with a second offer which was still $4k under my next lowest. needless to say, I declined.
TLDR: great interview and engineers, the first offer was low, HR was a nightmare, wouldn't negotiate without copies of my other offer letters; I declined for morality reasons and got a second offer that was still my lowest offer.