I own four Marriott's in Palm Desert and use all four as "traders". They are 2 BR units and I always split them into the 1 BR and efficiency. One of my "traders" is a Shadow Ridge Enclaves Deluxe which splits into two 1-BR units and although one side is smaller, then seem to trade similarly.
In 17 years of exchanging these units I have made about 100 exchanges and in 15% of the time I stayed in 1 BR units and the rest of the time I stayed in 2 BR units. But I don't travel during school breaks and typically don't book during the highest demand periods. I like traveling during the shoulder season while the "kiddo's" are in school. Also, I prefer driving vacations so 90% of our exchanges are into California or Arizona locations - - but there are a lot of different locations within driving distance (Palm Desert, Newport Coast, Canyon Villas, Starr Pass, 4 Seasons Troon, Timberlodge, Northstar (Tahoe), Harbortown Pointe, SVC Vino Bello (before they left ii), Hyatt Pinon Pointe, The Ridge on Sedona Golf, Sedona Summit, Hyatt Carmel, etc.). But I have also traded into Hawaii eight times.
BTW, I really enjoy the Palm Desert area so we go there perhaps 3 or 4 times a year. We live only about 2 hours from there. I typically deposit an efficiency and trade up into a 2 BR, sometimes at the same location in which I had deposited. I also go to Newport Coast a couple of times a year, but it is a bit rare to exchange an efficiency into one of their 2 BR units.
So for me, my Marriott Palm Desert units (4) seem to trade fairly well and the exchanges work for my needs and wants. (BTW, I always reserve the highest TDI). But I suspect that there are other Marriott TS that have lower MFs and may trade just as well or better. My best trader (by a little bit) is the Shadow Ridge Enclaves Deluxe.