Having owned deeded, right to use and points/credits system timeshare ownerships since 1985 and used RCI and II extensively during our ownership, we found the WorldMark point/credit system worked best for us as our desired resorts changed while our children were growing up. That said, I must qualify my statement. In 1998 when we I purchased our first WorldMark contract, the resorts were developed and managed by Trendwest, started by Jeldwen of Klamath Falls, Oregon. Confirming reservations was easy and units at the resorts around Oregon and Washington were generally available when we wanted to travel. When Trendwest was bought by Cendant, vis-à-vis Wyndham, our ownership started losing value as Wyndham changed offerings to prospective t/s buyers. Each new sales program offered to new buyers moved our ownership further down the booking priority list even though we were paying the same annual fees.
We had good success exchanging through II and some success with RCI. After Wyndham bought RCI, our success rate exchanging WM for other resorts improved dramatically. The down side was the ever increasing annual fees and housekeeping fees and the opening up of the resorts in Oregon and Washington to other Wyndham affiliates making bookings harder to secure. A plus was having access to Wyndham Club Pass using those points bought before Cendant/Wyndham bought Trendwest.
Today we are attempting to wind down our WM ownership, that being quite a challenge to make happen. Wyndham's Title/Transfer Department can't be much slower in processing our transfer of 50,000 credits to our buyer which began February 19, 2020. Today we are four (4) months into this fiasco and I was told yesterday it would take another 8 weeks to complete the transfer. As a retired Mortgage Banker, my former loan processing and closing crew could have processed and closed hundreds of mortgage loans in the time it's taking Wyndham to handle a simple transfer.
If the reader is considering the purchase of WorldMark credit on the secondary market, be prepared to wait a ridiculous amount of time before you have your acquisition processed and completed.
If you buy WorldMark credits, understand that getting rid of them requires a lot of patience as frustration builds.
P.S. Today we are using Home Away and VRBO to secure our vacations, the costs being similar to our timeshare ownership but with many more choices.