While nice, it is not without its caveats, if CBP officer does not like you, you are gone. "Travelers should be aware that by requesting admission under the Vi

While nice, it is not without its caveats, if CBP officer does not like you, you are gone. "Travelers should be aware that by requesting admission under the Visa Waiver Program, they are generally waiving their right to review or appeal a CBP officer’s decision as to their application for admission at the port of entry. Likewise, if the traveler is later found to have violated the conditions of admission under the Visa Waiver Program, they do not have the right to contest a removal order (See the CBP website for additional details.) "