Vantaggi
SAP is big, and will stick around. Much depends on the manager: does she / he take care of the team members, or strictly manage up for own career goals. I have experienced both, and if you are lucky, this will be a great company to work for. The company's willingness to move to cloud is there, with considerable investment to implement change: which is amazing to observe and be part of. In general, the US offices are good facilities to work, working from home is mostly not an issue.
Svantaggi
SAP is big, and moves slow. Change is managed by huge teams, with an emphasis on 'manage', not getting it done. At least in the US, SAP embraces the hire/fire mentality: if a team becomes obsolete in the eye of a VP, there's no support for individual team members to find alternative positions within the company: no matter how experienced, talented and skilled these people are, how long they have been with the company. No sanity check by HR. As a result, loyalty is heavily affected, especially among the younger generations.