Pros
Working with people of similar demographic and interests, so making friends with coworkers is easy. There are a few different schedules offered (weekday business hours are 9a-11:30p) so you might find something that works for you. Office environment is laid back, perfect for fresh out of college. Can wear casual clothes, there are a lot of morale-boosting activities, usually on a monthly basis. The company will pay for (and give bonuses for) getting certified in various health fields like personal training, nutrition specialties, etc. It's a great stepping stone job and having WebMD on the resume is nice.
Cons
Depending on what schedule is available at time of hire and what you're put on, work-life balance can be terrible. Your entire day is micromanaged from start to finish, so keep that in mind when figuring out if this is a good job for you. Things are constantly changing and supervisors/management positions have a hard time with keeping things consistent and streamlining information for the health coaches.