For me Interval charge to much money ,I did joint for one year .Doesn't work for me You can find good deal and cheaper then Interval on internet ,I did call them and check the price ,often ,they more expensif.
To paid your time share you must have a place to go with out paid $89.00 to joint Interval ,To trade your week in aruba you should have no problem go board or E-Bay.
I own with Marriott and i do buniss with them .Good Luck ginette