FWIW...I use them and swear by them.
A point not covered above…the straps for each hand are important, since they let you use a strap in place of a clenched hand as the “tendon” that connects arm to pole. With the strap adjusted correctly, your hand only guides the pole.
My poles have often prevented a fall going downhill (where I might put my hand outside the strap) and only once caused a fall.
Poles are enormously useful when crossing a stream on a log, or helpful if stone walking.
_Mike_