The first item here. Has anyone tried it? Does it work well? I'm interested, but I kind of have large thighs/buttocks. Do you think that would be an issue with something like this?

I've not tried it myself, but here's some threads discussing it -

https://www.susans.org/forums/index.php?topic=85283.0

https://www.susans.org/forums/index.php?topic=108825.0

https://www.susans.org/forums/index.php?topic=114433.0

https://www.susans.org/forums/index.php?topic=88822.20

https://www.susans.org/forums/index.php?topic=123730.0

https://www.susans.org/forums/index.php?topic=119516.0

Sorry for not labeling them more informatively.

Thank you very much, I didn;t know people had already talked about this!

I used it for over a year and LOVED IT. no rolling up, very comfortable. i dont thing your thighs/butt will be an issue since it stretches and the butt/crotch area is actually split cotton, not spandex/whatever.
it doesnt bind as well as tritop (only 2 layers) but it was worth it for me since it didn't roll up

Yeah, the rolling up was a huge issue for me when I used full-length binders (now I have a zipup from LesLoveBoat). Do you think this would bind a C-cup?

Thanks for posting, I have been rooting around trying to find info about this product.