Pros
Clearwell Systems is a market leader in an emerging space called electronic discovery. Being a leader, they will have great growth and will likely dominate. If you want to learn about this area, and want to build your carreer, this company would be a good one.
Cons
The company can be a difficult place to work on account of "cultural fit". You may find that you need to be an outgoing, social person, yet doesn't ask tough questions. Especially troublesome would be if you ask your boss a tough question - he/she will get defensive. You'll also be shocked when you get your annual performance review. Even if you put in extra-ordinary effort and everything looks great, when it comes to review, you'll likely be surprised that others who were more of a cultural fit get better reviews, better raises and promotions.