Pros
There's alot of talent here and the people are great to work with. Although it's a big firm, it's a warm and welcoming environment where you're not just a number. Upper management cares about their employees and the CEO is awesome. HKS cares about their employees work/life balance and I don't feel like I'm working in a sweatshop. Of course there will be deadlines that require working long hours, but for the most part I have a life outside the office. The company understands our personal needs and allows flex work schedule. They also provide laptops to all employees to access technology from anywhere. The firmwide and office resources are excellent. They also pay for parking and transit subsidies. Other benefits such as 401k, health/dental, etc are pretty much on par with other large firms. Oh and they even offer pet insurance!
Cons
There's always going to be pros and cons at every office. I think there are way less cons at HKS than at other large firms I've worked at. If had to think of some, it would probably be the benefits. They have a good vacation/sick policy which adds up to about 5 weeks total whereas other firms only provide only 3 weeks PTO for vacation/sick. My biggest complaint would be the dental and health insurance. They only offer HDHP/HSA health insurance plans which I suppose is becoming the industry standard. The HMO dental insurance is cheap but not all that great in terms of their in-network dentists...however the PPO dental insurance is expensive. Other than that I don't have many complaints.