Vantaggi
Nice brand which may look nice in a CV during early stages of a carrier. Accenture's marketing budget hides the reality of an un appropriate and unethical culture triggered by a mix of factors such as hyper internal competition amongst employees which push them to have poor behavior (At Accenture, this is exaggerated, compared to other companies). But their branding power wipes out this reality, so the good side is the company name may look nice in your CV for those recruiters unaware of the reality.
Svantaggi
Exagerated internal competition culture, lack of trust amongst employees and a need to prioritise the pyramid structure maintenance as opposite to compensate true talent who may not be interested in becoming Manager, Senior Mgr., etc. (vertical growth). Often, employees want to grow technically (not vertically in a hierarchy). Very political environment oriented to satisfying the pocket of few at the to of the hierarchy.