Hi and welcome to TUG!
This is a Starwood timeshare, so I moved your question to that forum.
I'd suggest that you start by reading the Starwood FAQ at the top of the forum, and let us know what questions you have.
Most of the people on TUG own timeshares (I own 7 including the one your are asking about) and find timesharing a great way to vacation at a lower cost, in larger and higher quality accommodations.
Regarding your original question - this may be a good acquisition for you, but it depends on many factors:
What season is this timeshare in?
Floating
Platinum
Gold
Silver
Do you usually take a full 1 week vacation every year?
Do you want to visit this particular location?
Would you like to trade it for other locations? List the top 5 destinations you'd like to travel to (these may or may not be places you already go.)
Can you afford the maintenance fee that will come due every year right after Christmas and will increase over time? (This year the increase was about 3% - but future increases are difficult to predict.)
Can you plan your vacations 12 or more mos. in advance?
Are you a detail oriented vacation planner?
Do you understand that a timeshare is a contractual financial obligation, and you may not be able to sell it if you want to get rid of it? (Right now, if you owned this timeshare and it is a Plat or floating week, you could easily give it away, or sell it for a modest amount, however, no one can tell you what things will be like next year or in 20 years.)
Here is a really important question:
1) Did the current owner buy this timeshare from the developer or did he buy it on the resale market?
2) Are you related to the owner?
Answer these questions and we can give you a lot more advice.