The Pro:
It looks to me to be a two hand operation. That’s a good thing when it comes to cutting limbs. Many folks have held the limb with one hand, the saw with the other. Chain bounces and lands on the back of the hand holding the limb. Ouch. (Yep - In my Care-Flight days, I‘d see some pretty pizzzzar chainsaw accidents.)
So - With both hands operating the machine. I guess there’d be little chance of that.

The Con:
With both hands on the machine. Standing on a step stool or ladder might be a trick. With no free hand to hold onto anything with, I can see folks taking a dive off the ladder while trying to reach out to cut that last (I caaaan reeeeach ittt…..) limb. I'm sure it says somewhere not to use without both feet on the ground. But we all know how that's gonna go.....

And being B&D, it may not survive the fall either.

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1980 300D - Veggie Burner !