Pros
If you're on a team with good people, it is possible to have a good experience. The key is to find people who truly work towards the values the university espouses and do not get caught up in the politics of leadership. Tuition benefits are great, but beware the hidden cost of taxes.
Cons
Cutting staff benefits is often a cost saving measure, so don't depend on it. It's a "discount" not a "benefit." Promotions and salary raises are completely dependent on who you work for and they pull with administration. HR is incompetent and aids in the nepotism with confusing and opaque policies. Career advancement is a joke within the university, but you can definitely gain experience that will be attractive to other institutions. Leadership is semi-tyrannical causing the rest of the university to jump at every whim. There is claim to a mission, but in reality the mission is to chase prestige.