The biggest pro you will experience from a climber is tree selection. You can get a saddle in almost any tree thats strong enough to hold you. A hang on will also open up more options for you but not quite as much as a saddle.
Pros: tree selection, lightweight, compact, very safe (if done properly), comfortable, behind tree, can shoot in almost any direction, can be more quiet setting up
Cons: IT IS VERY HARD TO SIT STILL IN A SADDLE. I find myself constantly shifting my weight and gradually swaying around (not as much for comfort, just of boredom mainly). Another potential con is safety if not done properly (same case for any stand), but I honestly think it is safer than any treestand if you follow proper procedures.
I have been hunting almost exclusively out of a saddle for 3 years. I sat in a hang on for the first time in a while last year and realized how much more still i sit in a hang on than in my saddle. I may switch back to a hang on for this reason, which is unfortunate because I much prefer all other aspects of the saddle. But at the end of the day, if you cant sit still, you probably wont see as many deer.
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