I'm a heavy, low cadence grinder. Mainly ride on the trainer (Zwift, TPV) though. I have somewhere between 30 and 35k km on them and haven't had an issue with play. Honestly, I might take them off that bike. Not that there's anything wrong with them, but I am not currently strong enough that I need to dual record and it seems like a waste to put wear on them when I could get some Look Keos to use instead and save them for outdoor rides or if I actually get strong enough to need to dual record (when I bought them, my 20-minute power was creeping into the 360's and a 375 W 20 minute without dual record is an automatic DQ in the races I do; I have only broken 350 once in the last year or 2 though).