Safeguard Dental Plan by 4 Dental Insurance.com- Affordable Dental Coverage

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Safeguard Dental Plan Information, Resources and Safeguard Dental Plan Solutions

Is anyone familiar with Safeguard dental plan? It is the "premier choice" dental HMO dental plan.
I am looking into signing up for this but it sounds too good to be true. Although it is listed a an HMO dental plan it seems it is just like a discount card where you have to use set dentists, and not really a formal plan. Does anyone have any experience using it? The quality of dentists on their list? Hidden fees, catches? For example they list crowns for around 250 which is pretty low....but it seems there may be other fees. Any help is appreciated.