While I'm no expert, I'd climb on it in certain situations. However, there are better materials out there for friction savers in my opinion. I know that self abrasion is bad and all, but all that means to me is "the life of this product will be shorter than those made with other materials." I use ice tail for my i&i prusiks, and will continue to do so until I get better/faster at popping of OP i&i's, but believe me, I never forget that the cord self abraids, and I retire them much more often than I do with other cords.....when it starts looking even a little "hairy" I retire the cord lickity split.
My largest concern is the hollow braid sliding over bark. I probably wouldn't climb on this FS if it had been installed remotely on even a semi rough bark tree. In my mind, I would be imagining the braid getting snagged on a rough piece of bark in the crotch and malforming when I loaded it. That's probably just my paranoia, but it's kept me alive so far so I don't question it's judgment. As a secret weapon, I'd be just fine with it. Personally, I use double braid poly for my FSs (I built a U-Saver by oldfart) and I like it a lot. It's very light and easy to splice. Biggest problem I had with it is the look of the thin diameter. Freaked me out for a while, but I got over it.