Pros
Fringe benefits are good I think.
Cons
As you are a vendor providing analytics and development services to clients, all of your time will be at client side working. Office provided by client side is cramped and stuffy as there are too many Siemens' employees trying to work in a space that is clearly too small. There are not enough PCs and chairs to use and you have to wait your turn if they are all occupied. As client information is classified, you can only use their PC and intranet for coding and analysis and you can't save your work externally to do on your own laptop at home. Their PCs also have no internet access and any surfing has to be done on your phone or laptop if you need to reference learning materials online. A horrible working environment in my opinion.