Pros
You could probably kill someone and not get fired. Great if you are the killing type. You can come in at 7am and leave at 3:45 and as long as your office isn't on shifts, no one can tell you no. The pay is good. If you are a self-starter and are willing to learn and train yourself, you won't mind the work. It's generally easy, just tedious. FERS retirement is good for a lifer. You'll never work another weekend again unless you want to.
Cons
Everyone is quitting! They are hardly replacing anyone. It is also easy to move from office to office via "hardship transfers" so less desirable offices have even more difficulty retaining people. All you have to do is say you have an ailing parent you need to be closer to, or fake an engagement and you can get to any area you want. This causes a lot of issues for smaller offices.