Pros
Good compensation, good people, flexible work environment, exposure to an IT environment that is complex and multi-faceted, good benefits, good time off policy, ability to move around within the company to advance your career, it's fun to be in downtown KCMO, it's an environment that is always changing, so the job doesn't ever get dull.
Cons
Some of the people managers lack people management skills; it's busiest around the Christmas season, which makes it hard to take extra time off at that time of year; there are reorganization changes almost every year that may or may not affect you; Block doesn't invest in projects that have a ROI of over a year. This prevents some necessary projects from being completed; it's a large company and there are definitely office politics in play.