Pros
Corporate Hyatt owned hotels are a wonderful environment to work in. The company takes pride in making sure the employees at every level know their number one responsibility is hospitality and what that means. If you are looking for a career in the hotel industry I highly recommend working for a corporate owned or managed Hyatt, Hyatt Place or Hyatt House.
Cons
Many of their properties have been sold to smaller investment groups over the last five years. These smaller companies are not always on board with doing things the way Hyatt does. Some are much more concerned about their bottom dollar. This is not true for all - but some of them. So research any Hyatt you consider working for to make sure the owner(s) are a company you would want to work for.