Vistana’s Signature Network of resorts is highly regarded as one of the best vacation ownerships in the industry. The Vistana Signature Network (VSN) includes Sheraton Resorts and Westin Resorts and has many prestigious establishments from Harbourside at Atlantis to the Westin Kaanapali. These 5 star resorts make Sheraton timeshares and Westin timeshares a very popular choice for vacationing. The Vistana points system allows for great flexibility within the VSN network.