Is AmeriPlan legitimate?

This Plan is offered by AmeriPlan® Corporation, a 24-year old corporation headquartered in Dallas, Texas. Discount benefits are available to 1.4 million members nationwide. AmeriPlan® is the largest and best known discount dental plan administrator that markets its plan directly to individual consumers. AmeriPlan® is a member in good standing with the United States Chamber of Commerce, the American Academy of Group Dental Practices, the National Association of Dental Plans, the National Association of Provider Access Organizations, and the Texas Retailer’s Association.