I've been walking for two weeks now, and I haven't seen anyone else using Pacer Poles.
I've never used poles before, so can't compare them to other brands, but I love mine. The handle makes them very intuitive to use, and also makes it easy to really support you when necessary.
I had a bit of a scare with mine today. I left them at a rest stop, but fortunately I hadn't hone too far - about 2.2 km, and they were still there waiting for me. Such a relief!
The extra 4.4 km of walking made me decide not to push on your the next town, which was 8 km away. Which was probably a good thing, since I think I've been pushing myself too hard the last few days.