Vantaggi
Flexibility of hours. In most cases if you need a day off or to work from home for a day or two it is granted.
Svantaggi
The biggest negitive is forced rankings. Basically when it comes to compensation the bottom 25% of employees get nothing, no raise, no bonus. Your manager is forced to rank his team using a scale of E, S1, S2, S3 & N. E being the best rating and N being the worst. If your manager has 10 employees, he must have at least 1 N(not meeting expectations) and 2 S3(low end satisfactory). All 3 will get no compensation. If all 10 employees are very close performance wise the manager must be unfair to 3. CIGNA has been using force ranking for more than 4 years now. Typically force rankings are used for a year or two to get rid of deadwood.