I have interviewed for a couple of positions with ESRI and, overall, the interview process will be incredibly long unless you tell them you have other offers that you're considering. I find their interview process in itself to be the most ridiculous and unnecessary approach. They make you interview with the entire team and this could vary in number. For example, I interviewed with 15-20 people in pairs over the course of two days. You'll start with a basic HR interview and then progress to individuals within the team, and these are scheduled weeks apart.
Additionally, they always claim that they're about "fit" - which I've found to be a very vague term. I don't even think they can describe it. Since they're about fit, too, you'll find that several job postings will be listed for months at a time, perhaps even a year, because they're more interested in "fit" and waiting for the "best" candidate. While this seems nice at first, it's more disastrous for ESRI because they'll turn down a lot of qualified, perfectly capable, candidates while they look for the magic perfect"fit" person. I think their idea of fit is subjective, wouldn't you say?
In the interviews themselves, I found pockets of very helpful and personal individuals and a fair share of rude, arrogant individuals. I've had folks ask me if I knew the job I was applying for and specifically tell me that if I didn't have any questions that directly pertained to the individual interviewing me that I was wasting their time. I always research the individuals I'll be speaking with as best I can so I can come prepared to ask tailored questions, but for them to deliberately say this to me was very offputting. I was also told last minute that I would be interviewing which didn't give me a lot of time to prepare. Specifically, I was asked at 8PM to interview with folks at 9AM the next morning.
I believe there's a fine line between confidence and arrogance - and several people that I've spoken to within the company cross that line and are very snooty ESRI's service.
I encourage future applicants to read reviews here, as well. I will reiterate a comment made by another reviewer from this position, and that is to say that I believe ESRI would have been a disastrous career move for me. They do not align with my career goals, and at the very least, I would rather work with individuals that are personable and humble - NOT arrogant.