Get text_long field value with EntityMetadataWrapper
Since the long text field is an array in the entity Metadata wrapper (due to fact that long text fields can have an input format applied to them),  you should decode the text.


See the Drupal.org entity Metadata documentation and search for the example
$wrapper->body->value->value(array('decode' => TRUE));
Also, check out this similar post about handling the formatting of long text fields when extracting with entity Metadata wrappers