It is commonly accepted that sintered copper alloy brake pads last several times longer than organic pads.
These comments still ring true in the bicycle brake pad market. Best applied only to hardened rotors the sintered pad option is great for dirt, dust, water splash and contaminated riding due to its higher mechanical strength and in all forms of use lasts many times longer than resin pads.
Sintered pads do tend to generate a little more heat, so in downhill use where a hydraulic system (cable systems are OK) is used, a metal stand-off pipe will be a great option behind the caliper to avoid hose ballooning. In normal flat or varied riding, this is not an issue and these pads just keep on lasting and lasting.