I have a pair of the Fury slings – I didn’t want the big metal thing on the front (and just hate things with hearts on them).
I’ve had the opposite experience. I’ve quite liked them. They fit the horse very well. They do not twist (the Scoot Boots I tried do, even with shims). And I really like the adjustability, although it’s not something you can really do on the fly, it’s a bit fiddly. And if you don’t have the adjustment right for the foot, it will twist, but I was able to figure out where I needed to tweak it to work. I haven’t had any rubs, but I’m not using them more than about 60-90 minutes at a time.
Like all boots, every shape doesn’t fit every horse. I measured really carefully multiple times & ended up just ordering two sizes & keeping the one that worked. I watched all the videos about sizing & fitting & recommend anyone do so, they’re extremely helpful
I’ve used them now for about 6 months or so. I like that the pastern strap is heavier duty than the scoots’ straps, no issues there. I did have one break at a narrow part around one screw on the side, but I sent it back under warranty & it was replaced free of charge, no problems since.
I’ve used Epics, Cavallos, as well. The Fury is by far the easiest to put on/take off. On this particular horse, they’ve been the most secure (have done W/T/C/small jumps). Good traction. Overall, they’ve been a really useful tool for me with my horse who doesn’t have textbook feet, they don’t exactly match (even though we’re working on improving that), these boots have allowed me to accommodate those differences as well as changes through his trim cycle.