We originally owned DVC.
DD, who was two at the time, convinced me to buy -- one look at her face during the Main Street parade sent me straight to the DVC sales presentation.
When we returned home, I Googled DVC and discovered the DIS's outstanding DVC forums. From there, I learned about resale and bought DVC resale. Later, we did a small add-on directly through DVC because it was actually cheaper than resale. At our max, we owned 430 DVC points which we shared with my two adult daughters and their families.
There is simply no better way to visit WDW than DVC. Our main home resort, and my fave, was OKW. We had many wonderful vacations with DVC, but eventually we encountered two problems. Our interests had changed and we wanted to go other places, and DVC's annual dues had increased greatly. So after about 8 years of ownership we sold at about a 30% loss -- which is amazingly good for timeshares.
My experience with DVC was that their sales force is relatively honest and professional, you can't beat the locations, but their villas (except OKW) are undersized and overpriced. And the portfolio of where you can go is VERY, VERY limited. But...location, location, location!
Having learned from that experience, I discovered TUG (mentioned above) and began researching resale timeshares in other systems. I purchased 501,000 Wyndham points on eBay for a little less than $2,000 all-in, including closing and transfer costs. My thinking, based on my DVC experience, was this: In for nothing; out for nothing; nothing lost.
To give you a sense of the size of that contract, our first trip was to our home resort Smoky Mountains (Sevierville, TN) and we had three two-bedroom villas (side-by-side even!) for a full week in the high summer season -- for 498K points.
Over the years, my two adult daughters and I used Wyndham for many trips (including a couple of RCI exchanges into DVC for WDW trips). I can't begin to list them all, but highlights were Las Vegas, NYC, AZ (Flagstaff & Sedona), Myrtle Beach, and San Francisco. Last year, I gave the contract back to Wyndham through their "Ovation" program for nothing -- no cost to them, or me.
My experience with Wyndham was that their resorts were excellent, their employees were great, their system worked great (may have changed since), there was amazing variety in places to go.
And their sales force is among the sleaziest in a sleazy industry. I think only Westgate compares, but Wyndham is working hard on getting worse (as of last year -- could have changed).
So the bottom line is great system to buy RESALE. Don't even think about buying from them direct, and especially not through the Discovery program.
The other distinction I would make between most timeshares and DVC is that DVC tends to keep the ground rules of the program the same. That is not true on many timeshares -- they can, and will, change the whole format of the system at a moment's notice.
So now I'm done with timeshares.