IMHO (very humble) considering that: The King usually didn't like to write letters or long messages, the incline of the signature looks to me not enought bent, the "P" of Presley look strange.. very squared, the "t" is strange.. I think is a good imitation. But I think that a "in person" authentication could be very important: If Roger Epperson or another expert say is ok.. it can be a very interesting object.