Pros
I was a part of the small group of SAP people in King of Prussia, PA for the half a year. If you want to join the group and you are OK with the average at best salary, give yourself a month for the extended test drive. Don't relocate or even rent a place before you will stay there for a while and understand how things work there for real. On the bright side, you will have 2 days of work from home policy. Your will have to decide about the details with your manager. Your success will depend on your managers efforts to absorb the mess that going on in the company up to down.
Cons
There is no link between the people who actually do things and the people who decide what to do and when. SAP admin practice is viewed by the management as the part of the infrastructure. Thus, the effort to install Windows 7 is similar in their eyes to install SAP ERP landscape. There is no link from the technical people to the level of the decision makers. You can expect some understanding from your technical leads/low level managers on one day, but things would be the same on the other day. You will have some freedom to make your everyday decisions about the technical issues because nobody has time to control them and people are overloaded because of the tight budget that didn't allow to hire enough people to cover even the critical tasks.