Very stable, sometimes to a fault.
Pros
Esri has never had any layoffs or taken on substantial debt, and as long as you don't rock the boat you can expect to work there as long as you please. People regularly work there for decades. Compared to the rest of the tech industry, I found this very comforting. If had a family, I would probably have valued the stability more. My managers and coworkers were all super nice. This is a nice place to work. Not being a public company has its advantages. Esri doesn't seek to maximize profit, they aim for slow and sustainable growth. Way less of a "move fast and break things" attitude than your average tech company. Salaried workers get paid for their time over 40 hours / week! This is called the "time bank", and it's the #1 best perk. In Portland, there is no expectation to work over 40 hours a week, but that isn't the case in Redlands.
Cons
Stability also means stagnation. The fact that they're (nearly) a monopoly in the GIS space means that they're more concerned with grooming their current clients rather than breaking new ground, at least in my experience. My work was fairly stagnant and boring within the organization. There is plenty of opportunity for advancement internally, but I found it easier to just leave and join a different company. The Portland office is extremely homogeneous. Efforts to diversify the workplace are lackluster, and the hiring manager I spoke to about it did not inspire confidence. No referral hiring bonuses. Salary is a bit below what you could be getting elsewhere. It's a pretty conservative company, in many senses of the word. For example, in the summer of 2020 it took way too long before leadership put out anything explicitly saying "Black Lives Matter", and even then the statement was pretty wishy-washy. I don't think it was followed up by any substantive actions. Esri makes software for police departments, the military, ICE, and border patrol. That's never going to change. There's a moral hazard to working there, depending on your politics.