i'm also a member in SIVC. Overall is ok i would say.
so far i only use it once in Bangkok. Room is great, big like what fuwa have in Bali. Only downside is location. But bangkok is small, so where u stayed doesnt really matters.

but one thing good for SIVC is that u can convert ur point n dump it to RCI. which they said is the largest vacation club in the world, they have thousand of hotel/resort around the world. Plus their hotel is much better (4-5stars) based on their hotel selection magazine. But i have yet to try with RCI, maybe Fuwa got experience with it.

Overall i think is good for frequent flier, downside is 7 days per year is very little..