Ok, I didn't read every response, so if I repeat..I am sorry.
I just bought via DVC about 3 weeks ago, since then I got a great deal of wonderful assistance including financing, temporary IDs within a day to begin making reservations. I even got $3000 off of my down payment through their current promotions (i bought 300 points). Since then I have made reservations for a visit right after Thanksgiving (a hard time to get.)
However, I was VERY tempted to buy via the TSS, especially due to the cost. The financing offered via DVC was at 10.5% but they give you a discount of 1% with an automatic checking withdrawal. So that may be a factor as well. SSR is for about 50 years, and as a previous reply stated, after the other resorts close, there is NO guarentee that any other resorts will be offered. So take into consideration the overall cost (minus any discounts + closing costs + finance charges) and divide it by the number of years you plan on going (be real) to get an actual cost. In my case,with my love of Disney and my past visits, I figured out that DVC was cheaper FOR ME.