I've been doing it a couple of years now. I like it. Still learning/trying new things and techniques with it. I started using it when I had a hip that was bone on bone and needed replacing. I couldn't climb with a climber...which I hated to carry anyway...and it was painful to sit in lockon stands (or stay in any position) for extended times. The saddle gave me the ability to change angles/stand and reduce some of the hip pain. After getting the hip fixed, I liked the saddle so much that I use it instead of a safety harness in every setup, including when I'm hunting out of a lockon.
I've only used a Hawk Saddle with a fixed bridge. Would like to give an adjustable bridge a try at some point. I ended up with the Hawk because it was on sale.
I've switched ropes for things and climbed in several ways. I've tried several options for climbing but I've only used the Lone Wolf seat as a platform because I already had it:
1. Carrying multiple climbing sticks and a platform was to much hassle/weight.
2. I used single stick (muddy) with an aider for a while and it's very easy to climb with. I've tried using a single stick as a platform and it works but ends up being uncomfortable if used very long. Using a Lone Wolf hand climber as a platform has been very comfortable but still means I would have to carry a stick and platform.
3. Have used a Lone Wolf seat with an aider attached to it, climbing the aider, standing on the seat, then moving the seat/aider up and repeating. Again, it's a comfortable platform but moving from the aider up onto the plaltform before going up the tree is kinda tough.
4. This year I've been attaching a rope/prussic to the aider and using it (with the saddle) to climb, hang, move the rope/aider up, then climb again. Once at height I pull my pack/platform up, hang the pack on the rope for the aider, then attach the Lone Wolf seat as the platform. I've only done this a few times this year but it's little gear to carry, easy to do, and very comfortable once up. I'll be doing this method a lot more this year to see how it turns out but I think it will be "the one" for me. Equipment ends up being saddle, 2 ropes (tether to saddle and tether to aider), aider, knee pads, platform, and a couple pieces of paracord to keep everything connected so I can't drop anything....of course a normal pullup rope as would be used for any tree stand.
The only aider I've used is the following and there are certainly smaller/lighter ones out there but this is the only one I've tried and I've been very happy with it because it stays open, is easy to attach, and is very strong. If using climbing sticks with attachment options to keep it open there are a lot more options:
https://www.rockandsnow.com/21330/Yates-6-Step-Big-Wall-Ladder/I've not tried repelling to exit. Climbing down the aider is easy enough so I've not felt the need to try any other option.
Because I've got ~4 months of rifle season in 2 states I stopped bow hunting years ago so I only use it for rifle hunting. It took me a bit of practice to get used to shooting/setting up to shoot a rifle. After learning how to let gravity, tension, and the tree steady things I've been very impressed with the ease of shooting and how quickly/quietly I can get it position to shoot. No standing/turning like in a normal treestand....just slide/rotate around to get in position.