Pros
Great benefits Friendly colleagues Nice office However that's about it. It really depends on which office you working at as some offices have horrible management which makes it even harder to come to work each morning.
Cons
Management is not supportive, would never help with anything, most of the time even demotivates you. But there are also very few people who can help but rare to find them. In most of offices there are zero career opportunities so not many people last more than a year. It's all about visibility and with whom you are a friend and who likable you are. Most of the manager don't do more than just have meeting which no one knows what they are about or spend the day on Facebook at work. There's lack of communication across the company, not many people know what they are doing including management. I believe there are much worse jobs out there, however I would definitely think twice. Few years ago this was a nice place to work, but with all the cost cuts, huge staff turnover and management it became a place where not many people want to be. Be prepared to spend 8h per day on the phone arguing with people who cannot read, unless you are on a language line which is closed and receives only emails. If you are looking for a job and need money go for it, but if you looking for a career or want to progress than rather choose something else as that's not going to happen unless you applying in the head office.