Dimitrios T.wrote a review of Black Diamond Alpine Carbon Cork Trekking Pole on December 18, 2012
Familiarity: I've put it through the wringer
Starting with the pros: these poles are light! Super light! I couldn't believe I was actually holding something. Black Diamond did a great job as always with the handle/grip and although the adjustment process might seem a bit difficult, you get used to it really fast. The poles are also extremely light - in case I haven't told you that. Clearly marked every 5 cm for adjusting the height and for a medium person (5ft9") like myself, I found them ideal. Securing the poles' height is easy with the plastic clips offering good grip even with light gloves (haven't tried with snow gloves).
HOWEVER, despite the fact that they super light, the plastic clip tents to open after 1 mile of hiking. Yes, it unlocks. I found out on the left pole at first. I thought it was my cargo/hiking pants and the fact that I had my map on the left torso pocket so the clip would "snap" on the pocket causing it to open. So I changed pants but I experienced the same problem. After further examination, I discovered that (a) it wasn't my pants but the vibration from the ground impact that would cause the clip to open (b) BD came with a replacement model that is exactly the same but with re-enforced clips (c) REI has stopped selling this model. That explains everything.
Why buy them? Because the problem can be fixed with duct tape. Now, if you don't suffer from severe OCD like myself and you don't mind using duct tape on a $150 pair of poles, then by all means, please buy them.
At least they are SUPER LIGHT!!! In case I haven't wrote that...