I have been using LEKI poles since the late '90s-early 2000's
First pair was an hybrid Alu-Carbon model with slightly inclined grips, IRRC called "Ventrix"
Used it for both on piste and off piste, swapping baskets.
This first iteration of the trigger was, from a safety standpoint, very friendly. But in its friendlienss it came its weak point too, IMHOL. The release mechanism was a bit too release-prone.
Those poles became victims of my son's skis, he borrowed them one day and managed to slice one in two while skiing...by planting it too close to the ski edge...
Second pair was a full carbon 14S, lasted a few years until I decied to have it shortened by a professional in a shop...
Told to come back after 15 minutes...I was there all the time and when, after 40 minutes couldn't see sgn of my poles started to be concerned...it turned out that the "professional" had tried toput the carbon shaft in a vise..crushing it completely....
Third pair, still currently in use, is an 11s model, full Alu, I got for free as a replacement from the above shop.
Third pair - bis , is an old full Alu model I purchased used (wanted to try a shorter lenght without touching the second one, so to avoid to go "blindingly" shorter...), red/silver, black, WC model I bought from an ex-racer, poles tips are worn out and couldn't fin a replacement for it, but they are stll useable. Preferred them over the "third pair" as they are sturdier. Since started to train though, I've converted them into SL poles by adding the handguards. Hence I do not use these for freeskiing anymore.
Fourth pair is an extra long, full carbon pair that I use for AT, off piste and steep skiing (bought it only because they were hea vily discounted). These are non trigger equipped, but the handle shape is very comfortable for AT conditions, with that "beak" shaped top, handy to accomodate one's palm when pushing.
Fifth pair is a Slalom hybrid ALU/Carbon Red/black. Still new, still unused, of the type favoured by top notch professionals here. I am not using it as of now, keeping in store for after the day I will pass my full certificatino exam, if ever.
Otherwise I will cut it into pieces if I will not pass it.
There should be a fitfth-bis, as during the first lockdown summer (2020) I had reached an agreement with a seller to buy a pair of used GS poles, meant for use in the GS gates (the straight one, number three is a bit "shaky" to use in the GS gates) . The exchange (money<->goods) should have occurred F2F that summer, but due to the travel restrictions it never happened..I have lost track of the seller ever since...so I guess that one is gone now. Luckily I did not send any money over.
Must agree with Phil that the gloves/trigger system is a real differentiating factor, even though I have not been particularly impressed by the two pairs of gloves I have (a five fingered and a mitten, white/red with metal notch protections, leather models). Got a new pair of Reusch last year and althought these are missing the integraton, are considerably warmer (I concede that comparing a brand new glove with a 10 years completely worn out old model might be a bit "skewed").
All in all I am very satisfied by the LEKI poles and the trigger system. As said by others, I am not sure I would be able to get back to normal grips and straps, sure can do for limited amount of time or for specific tasks like GS, currently using an old pair of Gipron alu GS straight poles, similer to the Scott ones in handgrip and shape, or AT skiing...