I have one. I think it's the best platform shape on the market. When I'm on it, I don't miss any space over my .5.
It beats the others hands down for foot room, imo, because the whole platform is in front of the bracket...no post to work around.
I've been grabbing the .5 this season, because I'm running their sticks and it packs so well. And I'm not getting out much, so I've done little exploring where I'd want less.
But I'm not selling the RRxl unless a well designed XL no stick platform hits the market. I've got the RRxl in a kit set to 2TC or 1 stick if I want.
I finally found a "decent" pack that it fits inside...it practically creates an internal frame. It's an old model Camelbak Motherlode.
I'm adding a Kifaru Duplex Lite and Stryker XL (shipped today), and think the RRxl will be one that fits that setup nicely.
The make or break for folks on OOAL seems to be the hanging device that OOAL uses. Honestly, it's a bit more fussy than cam-locking a post...but I've been able to get it super solid without too much trouble at all. And, as I mentioned, their system makes the whole platform usable.
I would ask around the community for thoughts on that tree attachment. Cause the platform itself, I love it.