Two sets of OEM pads and one aftermarket set between them over 154500 kms or since the bike was new in 1999. 4th set of pads due in the next 15,000kms but will do on the next tyre change anyway.
Tossed the aftermarket set bin after 20,000 kms as they were to noisy so current set has about 65,000 kms wear and estimating one third of my riding is towing the trailer and 80 percent is now two up. Even still I rarely use the brakes unless needed. I find the 1100 has more than adequate engine braking for about 90 percent of my usage.
Still have original discs with no sign of disc wear on any disc and brake dust is a given but I'm lucky to clean my wheels more than twice a year anyway.