Been using these now for several months and part of the XC racing season. I am a cable disk brake holdout. Have tried several levers, most now in the trash. All the reasons that you might still be using cable brakes (simplicity and durability) are reasons you should look into these. The sealed bearing (as opposed to bushings used on all other levers which wear out) negates the need for a return spring (another thing that can break) but does give you instant feedback on what your calipers and cables are doing (this is a plus for me but might be a minus for some).
Even the price just for the levers, while steep, pales in comparison to what you might spend on a comparable hydraulic setup over the life of the system.
The long length clears SRAM "Grip-Shift" like it was designed for the purpose. I get gobs of single finger power with all that leverage too.
Cosmetically, the finish is top notch.