Avantages
Right now, there aren't any real pros. Pay and benefits are not comparable to what you can get at Microsoft or Amazon or Google. This used to be compensated for by the supportive, nurturing culture, and the chance that your stock options would be worth a lot of money someday. However, over the course of 2022-2023, the culture has completely evaporated: employees no longer trust executives, or in many cases their managers; working 36-40 hour weeks is now much more difficult because of all the layoffs and other financial cuts (e.g. not renewing very useful tools, so now that work needs to be done less efficiently); and the total lack of strategic vision makes working with acquired companies or being part of a canceled project feel terrible, because there's no general belief that said company was actually a good acquisition, or that the project in question really should have been cancelled.
Inconvénients
Pay and benefits aren't terrible, but they aren't really close to what you can get at Microsoft or Google or Amazon. (I'm talking about engineers and PMs, I don't know anything about HR or Finance or LCA or whatever). I left Microsoft after 22+ years to join Unity back when it was still more like a family than a company, and it was the best decision I ever made, despite taking a pay cut and losing unvested options. Now, however, it's in the same general ballpark as working at Microsoft, in terms of quality of life; but the overall compensation is still what you'd expect from a family-style business.