Pros
Nice people, and free food if you're on-site. That's about it.
Cons
I wouldn't recommend this place to anyone with prior research experience. Lieberman hires a good number of interns from the Masters of Industrial/Organizational Psychology program at Hofstra and several of them have become the "shining stars" of the company. You'll know who these folks are - they're promoted pretty much every year, are protected by their superiors and loved on by the partners. Everyone else just fills space in management's view. It's not worth your time and effort unless you're straight out of school. Prepare to be low-balled on salary, too. Also, the company has a poor business model - a couple of years ago they over-hired and acquired another (smaller) company, only to see the work dry up a few months later resulting in lots of layoffs. Remote employees beware - you'll likely be the first to go.