Further details on the Westin exchanges and availability would interest me.
Are the Sheraton resorts that you are considering to be stronger traders than SVV have comparable M/F's ?
The main value of buying a Starwood II trader is the Starwood to Starwood trading priority in II. But, SVV will not have the same value when trading for other resorts (non-Starwood) because Florida has more supply than demand, which hurts trading value.
That being said, Starwood is going through some big changes right now, and there is no way to know how it will impact trading with Interval in the long-run.
1) They have split their timeshare and hotel divisions into separate companies, and renamed the timeshare division.
2) They have introduced a new Flex Points program at several resorts, and it appears that this is how they will sell all new resorts in the future.
In the past, it was relatively easy to
get off-season trades to the top resorts like the Maui resorts, and Harborside. But now we are seeing fewer deposits.
Starwood has 100% control of what gets deposited, and there are some suspicions that they are holding back prime inventory for their new flex program, which is being sold at a number of resorts, and will be sold at the new Maui resort.
If you are completely flexible about where you go, and don't need high season weeks during holidays, you can definitely get some trades, but if you are hoping to trade for the top resorts, or high season, it's just not as easy as it used to be.
Because of these changes, one should not apply previous trading patterns to the future of Interval trading.
*You might want to post WHERE and WHEN you want to trade through II, to get more specific feedback.