Do you want to regularly stay at other HICV properties? if you do, you would have more reliable inventory if you are willing to book at 10 months plus more overall inventory closer in vs rci. The booking fee would be something like $65 vs the $309 exchange fee through rci or the $239 through interval. I am not sure if you currently use rci or II. Your MF's are going to go up about $500 for those extra 40,000 points plus you will have an annual membership dues. I don't know what they are but I am going to guess around $200. I don't think it would be worth it for single week stay somewhere but you could probably do 12-15 weekday stay broken into 3 or 4 separate bookings and can bank and borrow. You would be gaining flexiblity but only you can say if that is worth it to you. If you really don't like or the other hicv locations aren't convenient then I would definately not pay to convert. Also are they taking your unit back and then giving you 210,000 trust points. If that is the case vs converting your unit and selling you an additional 40k package, your MF's could increase significantly.