Overall I would think the job would be above average, but that also depends on where you live and local econony.. Not sure what the pay scale is, but you get Federal holidays, benefits, retirement... I am assuming you would be a full time employee though.
Im a state worker (tax auditor) and co-workers bitch and moan all the time about the state.. But we get around 11 holidays (plus extra days as the governor feels generous).. The Virginia retirement system is rated one of the top 5 or so in the nation. .. Our health insurance premiums are very reasonable (i pay about $130/mth for my wife and I - My wife was just had outpatient gall bladder surgery and it cost us $100 out of pocket, followed by two hospital stays, each costing us $300 out of pocket), and I get way too much leave time each year (total of all categories would be around 220 hours/yr) .. SO with that said, there will always be someone bitching about their job/employer and others like me that are tickled pink to have my job...
good luck in your decision..
brian