Pros
1, Flat organizationm not many layers of management. There are no assistant sitting outside the offices of CEO and CTO! 2. Founder is engineer, is willing to investment on technology and engineers. You always use the latest technology 3. Stable, no layoff. Actually expand dramatically during recession. 4. Market leader, very expensive products and good profit margin. 5. Good pay and good benefits($50/month for whole family insurance) 6. No one bothers you. You just finish your work and go home.
Cons
1. No culture. You just work and go home. 2. No social. You only know the people you have worked with. And it is designed to let you work with small number of people(yes, it is quite efficient) 3. No change. No rotation. You will work on the same project/product for 10 years. 3. Poor management. Many managers/directors/project managers were promoted simply because they have been in company for long. They do not have the talent and training to be good leader. And when they become managers, they promote even less competent..... Management often is the weakest link in a team. 4. Unpredictable future after the founder retires.