JR in MT wrote a review of Black Diamond Spire Elliptic Trekking Pole on December 26, 2009
Not any lighter than my ski poles but more versatile! The flick lock and the autolock 'binary system' on the lower section are both reliable. I've traversed scree slopes with one pole fully exended and the other fully collapsed. It was a pleasure having them for that. The flexible tips have also been put to the test and it is a nice feature.Only two possible improvements I've found in a solid year of four season use: It would be nice if they CAME with powder baskets....but they are available separately; and the very comfortable and supportive wrap around straps aren't quite long enough to use with Black Diamond's Mercury Mitts when the temps drop. You can get the mitt through them but there just isn't enough length to run the strap through your hand, under your palm, and over the back of your wrist with mitts on. Had to adjust to use them running up over the back of the hand. Still functional but not as comfortable.My wife wanted adjustable poles instead of ski poles so I got her a pair for Christmas that are conveniently identical to mine (in case one of mine goes bad).Lastly, BD service is top notch. I left my pole unattended right next to my tent for about 30 minutees one trip and a Marmot drug it away from the tent and demolished the foam hand grip and strap. They like the salt from human sweat. Photo attached - BAD Marmot! I patched it up with duct tape but had another big four day trip coming in just a week. BD Customer Service sent me a replacement via two day shipping and my poles were back in shape in time for my Granite Peak trip - summited!BD is my first choice for most products!