18 months and drive side starting to wobble on one set, 18 months without a whimper on the other. One set went from ht to fs half way through, the other has gone from fs to singlespeed half way through. No idea on mileage but the singlespeed ones (still going) have been ridden at least weekly in that time in all sorts of silly weathers.
My mates ones (further 3 bb’s) have similarly good longvevity, we bought a load together to get the free tool from betd and at 18 months, mine were the first set to go. I wonder if we all got a ‘good batch’? FWIW I found the seals to be a really good fit on mine, and little in the way of gunk behind them. Perhaps its a change in outer seals rather than the bearings?