Essentially all saddles (minus the hammocks) support your weight on straps. That requires some time in the yard hanging in them so that your body can adjust to the new weight distribution points. One mistake many new guys make, is they buy a saddle sit in it for 20 minutes in the yard then rush into the woods to use it for a 6 hour sit. You’ll fidget and hurt if you do that. As a couple guys mentioned below, your tether height and distance of your ascender or prusik from the tree, control your angle. Some people sit down and enjoy pressure under their legs instead of on their waist or hips. Some people (usually those prone to leaning) like the weight more central and even into their back. The higher your tether is, the steeper your angle from the tree is, the lower, the more flat. If you lower it to chest height and give yourself a little slack, as mentioned above, you’ll essentially have 85 percent of your weight on your stand with the saddle just keeping you from falling backwards. You won’t feel much from the saddle but if you don’t stand up all day at work, you might not find this comfortable. The key here will be to spend time in your yard adjusting the tether height up and down (try to stay between top of your head and no lower than your shoulders) also I believe the XC has the bridge prusiks wrapped on the bridge loops. You can slid those up and down to adjust where the bulk of the pressure pulls from. The higher up on the bridge loops they are, the more it’ll pull from your waist, the lower, the more it’ll pull from under your legs. I always say start with your bridge length around 24”, Find a comfortable spot where your bridge wraps your bridge loops, then play with your tether height to fine tune that. Finally, when you feel like it’s getting comfortable let the bridge out longer and also try pulling it shorter until you’ve hit that sweet spot. Once you’ve done all of that fidgeting (preferably at home), sit in it for an hour or so a couple straight days before you go back to the woods. You’ll have your spots dialed in, your body more used to the pressure points, and you’ll understand how small adjustments can help ease those pressure points when you are out for an all day sit. Sorry for the long reply but I wanted to be thorough.