My own issue with the Lansky diamond hones was a two-part one. First, the small, even tiny, size of them (4" x 1/2") leaves them inherently vulnerable to extra wear. That small diamond surface area has to do a lot more work, spread amongst a lot less abrasive grit. Grinding pace is therefore slower, and my own tendency was to try 'speeding things up' a bit with a little more pressure, which never ends well. I don't know if that contributed to wear as much as it DID contribute to very rapid loading of the hone with swarf. A low-alloy stainless blade could clog up a Coarse/XC hone in a few minutes' time, rendering it unusable. That loading up of swarf was the secondary issue for me, and left me frustrated in using them. The coarser hones seemed more vulnerable to loading, although the medium & fine hones did better and suited my expectations for lighter touch-ups of the edge. I avoided using the XC and Coarse, in favor of using the Medium diamond for jobs that rightfully warranted a coarser hone, only because I didn't want to deal with the excessive loading of the coarser ones. I did use one of my Medium diamond hones a LOT for heavier work, and shortened it's useful life quite a bit. It gave up most of what it had in a reprofiling job on a thick-edged S30V blade.
I subsequently tried DMT's products, and never ran into the same issues with loading, in particular. I also discovered I liked the feedback and finish much better, off of these hones. I've since never looked back.
David