I got one a few months back. When I manage to blap the thing down it's good. This is fine if you're on a nice flat non technical surface and you know in advance you want to drop your seat post at that point in time. And it's great just pulling the lever and the post going back again.
But I don't always get it to go down first hit, or second, or third, or forth, resulting in the comedic effect hora describes.
If you want the general idea of this, next time you're approaching a fun downhill on a night ride, going through a few ruts or loose babyhead stuff, simply place one hand under the nose of your saddle as if you're pulling a lever, and bounce up and down v hard on your saddle. Until you lose your bottle, stop, and adjust the **** post manually.
There's probably a knack to this, but a handlebar mounted release lever feels like a worthwhile investment at the mo. I shall persevere….