They are economical and therefore for their price they are OK. I did not encounter any significant problem but if they had a higher price I would judge them particularly negatively because:
1) The fast lock mechanism is not the most convenient. The screws need to be tightened quite a bit to stay at a stable height. If you do that, though, it's OK - you just need to check at first.
2) They give some sense of wobbling / "shaking".
3) The numbers indicating the height in cm faded in several places after 2-3 uses and although this is not critical, it slows down the adjustment.
UPDATE:
- One broke (became slightly bent) very quickly and without much strain. Therefore, I do not recommend them for regular / intensive use.

Question mark... I bought them based on reviews. The older ones from the same company broke after two years and without much use.

Excellent purchase. Sturdy, stable, easy to grip, very easy height adjustment, compact size when closed, lightweight, withstands my weight of 113 kilograms. One observation. You tighten the clamps with pliers.

Very good batons. User-friendly and lock perfectly. Lightweight and at a good price. The only disadvantage is that they do not have a spring for shock absorption.

They were used for climbing Mount Olympus. Excellent poles and lightweight! The Fast Lock system works perfectly. However, be careful because it needs to be tightened well in order to be stable!