ADAM'S was founded in 1971 and has grown every year since, including during recessions, such as in 2008 when ADAM'S grew by 10%. While many companies grow through acquisition, ADAM'S has grown organically, and in fact have at times gone years without a dedicated salesperson.
They do business with integrity and rational thinking. Overall, it's an excellent place to work, with products that are winning in the marketplace.
Stable company that has grown through multiple recessions, therefore it offers growth opportunities to those willing to take on challenges and more responsibilities.
No major cons to speak of.