javabytes -
I have two memberships to Global Discovery Vacations which I believe is a part of the Global Vacations Network. The prices you listed sound the same or similar.
You will find naysayers. You may also find people, like myself, who are able to use the membership advantageously.
I have stayed in Oahu, Maui, Molokai, Kauai, Colorado, Banff, Bermuda, and other locations using GDV. For a family, the separate bedroom(s) and kitchen are preferable to a hotel room, for less than a price of a hotel room.
But, you need to be very flexible in location & timeframe and patient with the booking process. Don't expect to travel in peak time periods with this. Be careful with the seasons as well.