Pros
Everyone loves LEGO. You tell people you were there and their face literally lights up. The products are fun and cool. It is a good product for children that you can feel proud of working on. You can often express yourself creatively and people are really passionate about working there.
Cons
I have never worked in such a nasty, backbiting place as this. As someone else mentioned, they will promise you the moon to get you to sign on, without any intent of keeping a single promise. And if you complain, they just ignore you and figure out a way to get rid of you. They only way to survive there is to be as aggressive as possible and step over the bodies of your coworkers as you climb the ladder. Until someone does it to you... Most of the people you work with are OK. Until you accidentally displease them and then get on their bad side forever. I saw it happen to all my colleagues, and then it happened to me. A person I worked with tried to get me fired for their own incompetence. Luckily, this was hard for them to do, since they were not my boss but my co-worker. (Seriously, what is wrong with a place where peers think they behave like that...) Taking the proper channels, I complained to my boss whom I assumed would be appalled. Nope. My boss totally abandoned me and threw me under the bus. Two weeks later, my replacement was hired (I was told this was a new co-worker) and I was forced out. I never even was told what I did wrong. To this day, I have no idea. My boss was forced out after that, so there is at least some karma. I saw them fire people who had been there ten years without a second look. There are many people I know in the field who will flat out not work with them because LEGO's reputation now precedes them (eg, low balling vendors, firing employees without cause, and generally trying to get out of paying what they owe).