Well, after using the fixed 120cm poles for a few weeks, I decided they seemed a little high, plus wanting to be able to adjust them for going up or down steep slopes made me decide to return the fixed poles.
So I ended up getting the Black Diamond Carbon FLZ adjustable z-poles.
Cost a lot more, but I think it was worth it in the end. (non-carbon FLZ z-poles were too much heavier for my tastes)
So far they seem to work great for me. I found that 115cm was the best for level ground for me.
They definitely helped on my Salkantay to Machu Picchu trek.
