Pros
It's not going anywhere. This company is stable since it's owned by stamps.com. It's profitable, especially for the owners and parent company.
Cons
If you want a job where you are more than a peon, this isn't the place. The company does a great job of putting on a facade of your importance and being employee centered. However, it is absolutely money centered (as a business should be) but they really couldn't care less about the minions that grind every day to make it all happen. This is a company that a few years ago valued and tried to keep its employees moral high but switched (after being acquired by Stamps.com) to the model we all know so well- the "we can always hire someone else" model. You will not develop any useful skills by working here. If you have no other choice and need a paycheck, it's great place. If you want a career and the chance to get somewhere in life, move on.