Mergers have made people unsettled - Avis employé Employé (anonyme) Merck

Benefits and pay are great

Depends on manager and organization is how your experience and work life balance will be

Work from home (that may not always be a perk, but it is now for writers), choice of flexible hours (7 AM - 9 AM starting), friendly, helpful people, great bosses, people very interested in their jobs, plus a lot of educational benefits, you are trained on all aspects of Merck and your job.

I cannot think of any, though sometimes work from home has its drawbacks, because the employee doesn't get all the information that an onsite employee would.