There isn’t a better brake than the modern The One, IMO. Power is superb without feeling excessive or unsubtle, and I’ve no idea what it takes to make them fade, I can’t do it.
But they don’t feel as durable as Saint. Lever pivot etc has much less metal in it. They have break-off clamp bolts to protect them though, and there’s a big weight saving if you care. Fully servicable unlike Saint but the parts aren’t cheap.
So, not open-and-shut but I can’t see past them, I have the Ones on my 23lb titanium hardtail and on my dh bike and they’re absolutely ideal for both. But it depends whether you like subtlety or not, and whether you value weight or ultimate strength.
There was a pit walk-round on Pinkbike which concluded that at the world cup, every single rider that didn’t have a brake sponsor was on Shimano or Formula. But these days how many brakes aren’t downhill-suitable? You could fire on Deores and be very happy. My Dare had 7-year-old Oros, no worries.