Check the frequency of usable empty legs in YOUR area of the country. I transferred from the DPJ empty legs program to the WU Core membership last year at a discounted rate. I'm interested mostly in the Mountain West CO & WY and there have been literally only a few empty legs available this past year, surprising and disappointing, and despite what the salespeople touted. For their charter or hourly rates you can usually do better with a good broker, so I will not be renewing this year, it has been a loss now for 2 years.