Pros
Some organizations and leaders are fantastic, knowledgeable, and will provide their direct reports with the support they need to not only do their job, but continue to grow. SHI provided me a number of opportunities to advance my career, which I've been able to parlay into a substantial raise... somewhere else.
Cons
Unfortunately, the cons heavily outweigh the pros at this point. As great as the good leaders are, there's an equal (if not greater) amount of poor senior leaders. I've had multiple leaders lie to me about responsibilities, enablement, compensation, for multiple roles in multiple organizations. Expect to have the scope of your responsibilities expanded (with no additional compensation), nearly constant realignments, and having your comp plan changed two weeks before a quarter ends so your management can hit their quota, at the expense of their direct reports missing their bonus and accelerators the following quarter. This could vary between orgs, but I've seen little to no onboarding be provided to new hires. Instead, existing, long tenured employees will be expected to train their newly peers (external hires) who in some cases are making ~50% more, with a more favorable base: bonus ratio.