Pros
Great benefits. 9 to 5 work schedule means good work to life balance. Work was rarely challenging, but not sure many would consider this a "pro"...
Cons
Work was rarely challenging. Office politics and environment were a cross, literally, between "One Flew Over the Cuckoo's Nest", "The Office", "Office Space", and a circus freak side-show. Many very intelligent, hardworking employees put forth effort that far exceeds expectations, but management rarely had feedback that was positive, and was quick to publicly criticize when any semblance of a mistake was made. Promotions are made on "who you know" as "how long have you been here" bases, so managers were often unqualified, low-achieving Miltons who had merely endured the caustic system for many years. Generally, the atmosphere is depressing and very few people are happy.