About four years ago I bought York Nordic Trekking/Hiking poles. They have been all over the world with me. I use them for balance.
I love how versatile they are. I lost the top of one of the poles. I contacted the company and got a real live person on the phone. When
I told her what I used the poles for, she not only sent a new top for the pole but a set of tips she felt would give me better balance.
On a recent month-long trip to eastern Europe, I lost one of the tips. Again, I contacted the company and new tips are on the way.
The products and customer service of this company is OUTSTANDING.

Just got them, so I have barely used them, but I thought I would clarify some earlier comments and answers to questions. When fully collapsed, this is 24" long. However, the 4 segments can be easily pulled apart and the longest of the pieces is 18-3/4", or 18-1/4" if I remove the rubber tip. (my Carry-on suitcase accommodates 22"). That's where the bag comes in handy - you can keep all 8 segments together when they're loose.

I plan to buy a pan-head and quick-release mount for a camera. It would be nice to have a tether on the removable knob so that it doesn't get misplaced while the camera is mounted.

Update: I applied my MacGyver skills. I melted a hole into the nylon strap, using a flame-heated phillips screwdriver, then inserted a short 1/4" bolt through the hole, locked it on with a nut, and now I have a place to screw on and store my removable know while the camera is mounted.

I was looking for a hiking pole that I could use for my go pro (versus having a separate stick) These are great. very sturdy and I like the twist locks I can really make them tight.

Sturdy and stayed in extended position through entire day of crossing river multiple times with relatively heavy leaning to stay upright in moderate rapids. The extension allowance fits a 6'6" man. Only downside was that the black cap came loose the very first time one of the poles was used by my wife and was never found. Seems like the caps ought to be secured tightly at the factory and it is not clear from their website that the manufacturer has replacement parts available

Looking forward to hiking a lot this summer with my new GoPro and these awesome poles. Pros: Poles are lightweight but sturdy. The adjustment mechanism is awesome; you just hand-twist the adjustment knob until you get just the right tension on the flip lock and then flip it down...it is basically like the way you get the right fit on a ski boot or rollerblade. I adjusted them easily and they stay in place with vigorous walking over uneven ground. The attachment for the camera is also sturdy and the right length so I am not at all worried about the camera falling off. When the pole is retracted all the way it makes a great monopod for the camera and the poles fit easily into my pack. I love that there is a ruler on the adjustable parts and the word "stop" so you can clearly see how far out you can adjust these safely. The padding on the hand grip is very good quality firm foam (not like the cheap stuff that wears out and flakes off after the first year). Overall very well made and comfortable to use. Cons: None so far; I am afraid I might lose some of the removable parts, (different walking grips and the screw cap for the camera) but that is my issue and easily fixed with a pouch for my pack : )