I may or may not have been that person, but I'm happy to answer any questions from the monopod perspective. Below is the best shot I can find quickly of my pole. It's a Costco Cascade Mountain CF trekking pole, the one they nearly always have on sale once or twice a year. I drilled a 1/4" hole in the top, cut the head off a 1/4-20 bolt (I think I used a 2", can't remember), and epoxied that into the top.
In the picture, you can see that I normally hike with a cheap V-yoke rifle rest mounted to it for quick off-hand shots. When I want to glass, that unscrews in a few seconds and I can screw on an ARCA receiver. I use an Aziak bino clamp on my binos that slides into that receiver. (I used the Vortex pin-and-cup style mount for a year or two but bent it and this has been more durable.)
I really like this setup because the pole is adjustable to longer lengths than some. I find that if I'm careful about where I set up, I can comfortably glass standing, especially if I rest my stick on a rock or log to give it a foot of extra height (I'm 6' even). If I want to sit awhile, I can just shorten the pole, or if I'm on a hill I can rest it further away from me and not even change it.
A monopod is never going to be as stable as a tripod - if I was glassing for an hour or more I'd prefer a tripod. But with my hunting style I tend to glass more in 3-10 minute blocks, tops. Usually I'm scanning valleys and meadows e.g. before coming out of a treeline, or if I'm sneaking through timber, doing a quick "sweep" every 25-50 yards (even low power binos really help you see "through" brush and tree alleys). I can comfortably use my 15x56 set while standing, in situations I would have normally needed to sit down, and my 10's and 12's for much longer than I normally would without getting tired.
I'm really happy with this setup overall, and have taken 3 elk just using the monopod as a rifle rest as well. It's also very inexpensive, and weighs almost nothing if you were going to carry a trekking pole anyway (an ounce or so for the clamp and rests). So those are the pros. For cons, again, it'll never match a tripod for comfort in a long glassing session, but also the Aziak clamp does mount to just one lens barrel, not in the center. There's a slight sideways tug with a heavier pair of binos that you don't notice for a minute or two, but does start to twist your wrist a bit if you stand there for 15 mins...
