In a nutshell, here's what Marriott did June, 2010. They created a new Trust point system. At the time their system was only full week other than some limited 3/4 day options at specified resorts. They gave ALL existing owners the chance to get into an exchange system called Destination points. The fee was not unreasonable for those who owned a few weeks. I think it was $495 for a single week that was bought retail and an extra $100 for multiple weeks. The fee was higher if ANY of the converted weeks were resale, I'm thinking it was $1495 for one week and $1995 for multiple. In addition to potential access both to new trust resorts and current resorts by a points system, they eliminated the need to belong to II, exchange fees to other Marriott's, change/cancelation fees and the $75 lockoff fee where applicable. In addition, they tied in a new VIP system. There's a yearly club fee but it's cheaper than the savings of other previous costs mentioned above, at least for me and many others. For me personally it was a very good choice. I own 9 weeks, 8 of which were resale and 3 of which have lockoff's.
It's not a perfect system either and I could talk about negatives as well but it's worked well for me and fit in well to my situation. Since converting in 2010, I've had 2 big trips. One to HI for 3 weeks. Of those 3 weeks I was able to get OF on Kauai and OF on Maui using the points and using the wait list priority that the VIP offered. I also got an exchange for the 3rd week so I banked my Ko Olina week I was planning to use. This past Jan/Feb we were in Aruba 10 days, also a combination of an exchange for 7 days and 4 nights using points. There were a couple of shorter stays in PCB. This summer I'll use my 3 Grande Ocean weeks and also have 3 matching reservations using points. It's worked well for me, is cheaper than before, gives me more and better options that I didn't have and essentially converted my resale weeks to the same as developer status.