The helo is a small platform but bigger than a tree saddle platform. Plus it has a seat so I can sit down in it. Just a more comfortable set up for me.
The reasons for using a saddle instead of just a harness. The saddle has 2 large linesman loops that are rigid and perfectly placed on my sides for easy use of hooking in the linesman rope. When I tie off. I use the bridge of the saddle which is at my waist and not on my back. I can lean off the stand if need be and be supported by the saddle and last but not least the saddle comes with 2 belt pouches that I use for various gear.
On a side note I use an ascender on my linesman rope. It make for quick easy adjustments. I use the same linesman rope and ascender with carabiner to tie off once on the platform.
I ordered 2 Kifaru shoulder straps and attached them to my helo stand. I can place the sticks on the stand and my small back pack and cinch them in with the 2 straps for attaching the stand to the tree.