If one is available, I may get it. The restraint belt is useful in some situations. The weight is fine on vertical reaching. Long horizontal reaches, at full extension, are challenging. Battery weight, is held close to the body, most of the time.
For safety reasons, I didn't use the harness on the tall house. I've gotten pretty good at getting the saw to the desired location quickly, so that the weight can rest on the branch. After the cut, I'm usually able to steer and let the saw fall to a lower cutting position.
Binding can be a big problem. If the cut gets pinched, at full extension, removal of the saw would require another long reach tool. It's happened to me several times as I worked from the ground. I removed the battery, so as to put less stress on the bar. A ladder and regular chainsaw was used to release it. On really high stuff, like the plum, I start at the branch tips, relieving weight as I go. A bind at this height, would require a
bucket truck or some dangerous climbing. I'm going to always plan these cuts carefully.