Rating: 2 / 5
Low rating because I've had horrible luck with the locking mechanism.
Bad: I haven't used these poles as much as I'd hoped, but after the first year, I couldn't get one lock on one pole (i.e., one of the four mechanisms on the pair) to lock anymore. Took it apart, tried to adjust it as per MSR's instructions, no dice. Paid to ship it to MSR, and they sent me a replacement. Used replacement two or three times, and same problem. With some instruction folks at REI, I can now take it all the way apart, mostly set the lock, and force it into position, but I can't collapse and extend the pole without having to disassemble it again.
Good: The other pole in this pair is great: it has not given me any problems, is comfortable, doesn't rattle, and works well with my 6'6" body. But, after twice having a pole quit on me in the middle of a hike (I typically start w/o poles, and use them only when I need to descend), I'm looking for a replacement.