Pros
Some of the people at MI are friendly and outgoing. It's a big recognizable brand name to have on your resume.
Cons
It's an absolute mess of an org. The operating model is insane. Over 3,000 different teams providing IT support inconsistently. Finding support where you need it is nearly impossible. Most of the simplest most trivial things (lift and shifts, system builds, security reviews, etc.) take multiple quarters to do. This is not a proactive thoughtful group; reactive firefighting and hyper escalation is how anything gets done. The burn out risk is very high and leaders are all so isolated in silos that few know what is going on. Zero project prioritization occurs, so everything is urgent. They use SAFE Agile but it's an incredibly clumsy and isolated series of micro-deployments of the practice. Every day feels like a reinvention of a wheel where seemingly there is no known process for anything. Marriott is not a good place for high performing IT professionals to come to work. The culture and norms will eat a high performer alive since high performance is so contrary to the norm; the demand for the high performer will drive them into burn out and work life balance issues.