Sheldona – I have a pair. Mine are the AM hubs built onto Mavic 717’s. They are light, stiff as hell, with pick up as good, if not better than a King (which I also have). I was surprised at how much abuse they take – I’m not talking DH’ing or anything, but I didn’t expect the 717’s to stay true with my riding style. Have got a 15 mm conversion to convert to 15QR – haven’t tried it yet, but conversion looks very straight forward. Bearings are super smooth, although my rear hub is in need of a free hub service – apparently you need some odd-sized rather small alan keys to get into them (which I haven’t tried myself yet). I am very impressed with them so far (have had them about 9 months or so). The only downside I can really find is getting spares – I’ve not found Just Riding Along to be that able, shall we say, to get them in a timely manner, but to be honest I think that has got a lot more to do with I9 themselves. I have got stuff from Competitive Cycling in the States, and they were very quick, if a little more pricey.