Pros
Flexible schedule... sometimes. Good pay... in some positions. High priority put on employee safety, especially in field. If local census office managers communicate with each other, office can be a wonderful place to work. If they don't, it can be hell.
Cons
Regional management unhelpful, blame you for their errors. Directions change at a moment's notice, rendering weeks of preparation irrelevant. Unusually harsh disciplinary procedures: if you make an error in calculation on your timesheet, you are terminated immediately and are never allowed to work in any government position for the rest of your life. I had to terminate one of my best employees for this reason--she'd made an addition error that showed her working 15 minutes extra one week, and she was terminated by the following Monday.