Pros
At the last 3 Hyatts I've worked at each hotel in Texas has created a fun, family-like environment. If you work hard and treat the company well they'll do the same for you. There are vast opportunities to move up with the company quickly and excellent management to help you get there. I cannot say enough good things and have enjoyed 6 1/2 years with the company recruited just out of college and others have helped me move into the position that I wanted and earned. The Corporate Management Trainee programs for college recruits is the best I've heard of out of all hotel chains. Lots of time is spent rotating throughout all hotel departments both learning extensively and getting to know others before the demands of being a manager begin. Also the only hotel chain left (so I've heard) to still recieve complimentary guestrooms as an employee perk. I've enjoyed this emensely and stayed at many beautiful Hyatts!
Cons
I've heard franchises aren't always ideal to work for as you don't recieve the same benefits. Some Hyatts also operate differently based on the budgets of owners which can be challenging.