I have used my alloy poles for about 6 years now and they have seen a lot of hard use, after returning from my last trip in Lapland, I had to replace the tips as they were completely worn away, it was an easy job. The alloy poles have stood up well to a lot of abuse and as Niel said the bottom sections are very scratched to the point the markings are no longer visible. Because I use my poles to support my SL2, I prefer alloy. The reasoning for this is because of possible damage on the trail leading to a broken pole e.g. falling etc.
Prior to using Pacer Poles I used REI poles and once I changed I was immediately taken by the usability of the poles with the left and right handles.
I occasionally use the camera mount as well as the snow baskets.