Pros
Easy job. Nice benefits. Good salary if you're not living in an expensive area.
Cons
No opportunities for career advancement. Merck was actively trying to get right of more seasoned sales reps so they could hire fresh college graduates so they could pay them less. Overall, if you're starting your career, stay away from Merck or any pharma company. There's no future in pharma sales. Merck has the most ridiculous year end performance reviews ever. You get stacked ranked no matter how well you did. Some people had great sales numbers but poor rankings because their manager didn't like them. Overall, a lot of politics involved with the reviews. If you like to play the game, Merck is the company for you. Merck is a very conservative company. Their policy and procedures will drive you crazy. Stay away if you want to grow your career or want any kind of job security. You're not going to get it at Merck.