Pros
The people who work at FlipKey are pretty much the only thing that make the company a tolerable place to be. These are mostly dedicated, hard-working and flat-out nice people, many of whom have been with the company since before the TripAdvisor purchase, who are hanging on due to an old sense of loyalty and / or stock option hopes. The company provides good comp and benefits, and there are snacks in the kitchen, both of which are things you'll find most anywhere these days. Work-life balance is also fair, possibly better than average.
Cons
Senior management has a negative and condescending attitude toward the vast majority of employees. Recognition and thanks are foreign concepts, which has resulted in incredibly low morale and a high turnover rate. There is zero potential for advancement or growth in any department, and employees have become used to the idea that keeping their heads down and doing what they're told is the only option. Creativity and innovation are non-existent.