Pros
I may be biased, but I think that the employees at FlipKey are some of the greatest people that you could work with. Intelligent, outgoing, fun... the list goes on and on. To go along with the fantastic coworkers, the work environment/benefits are comparable to Google, in that you'll be challenged to find a company with better ones. Full health, dental, vision, 401K, travel reimbursement, commuting reimbursement, fitness reimbursement. A brand new office in the north end right next to the Garden, where we usually get emails about ticket deals for games. In the office we have hot, catered lunch provided a minimum of 2 times a week, and breakfast every other Friday. That's not to say that you couldn't create a meal out of all of the snacks in the office. A full pantry, multiple coffee machines, 2 kegs, a wine bar, etc etc.
Lots of vacation time & holidays and they encourage you to use your sick days. Managers listen to your problems and actually care about you & your well-being. Very flexible, approachable & willing to help at all times
Cons
If you're not the type to speak up for yourself, this is probably not the place for you. We're all adults here and no one's going to baby you or be a mind-reader if you're unhappy. Keeping those negative feelings bottled up until you end up quitting isn't benefiting anyone. My manager is great and any time I've ever had a problem it's been resolved by talking it out.
Customer service is a difficult position to be in no matter where you work, and you're always going to be dealing with people who are unhappy. That seems to be more of a reflection on the position itself and not related to the company necessarily.