Our Horizons Branson trades really great in flexchange.
We bought ours to mostly use for trading back into Orlando. Of course, Orlando has plenty of supply so we can trade for 1 and 2 bedroom Marriotts very easily with the 1 bedroom side of our Gold Branson week.
Right now on II sitting online I can see Marriott's Newport Coast for December and January weeks. Then I see some May weeks sitting out there and then it skips summer and I see September weeks. Of course, this is just what I see sitting online at this moment.